Which hair dryer is least damaging?

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Which hair dryer is least damaging?
Photo: Rozette Rago

Most hair dryers are effective at blowing hot air toward your head—sometimes quite fast—in order to speed along your hair styling from showering to whatever’s next. It’s the small differences between models that can make a big difference overall, particularly with daily use. After putting in 20 hours of research and spending nearly 50 hours testing 39 dryers, we’ve found that some dryers are far more pleasant to hold and use than others. Because it provides an excellent experience for the price, we think the Rusk W8less Professional 2000 Watt Dryer is the best choice.

How we picked


  • We looked only at dryers with multiple heat settings. We also preferred a cool-shot option.

  • A too-short cord renders even the most effective hair dryer useless in certain situations.

  • Lighter-weight dryers (around a pound) are easier and more enjoyable to use for long periods of time.

Read more

Our pick

Which hair dryer is least damaging?

Rusk W8less Professional 2000 Watt Dryer

Fast and light

Our favorite hair dryer is lightweight and equipped with a long cord, and among the models we tested, it tied for blowing the hottest and fastest air. We like it just as much as dryers several times the price.

Buying Options

*At the time of publishing, the price was $110.

Speed and heat are the only features that matter for drying your hair efficiently, and with a 55 mph airflow that exceeds 245 degrees Fahrenheit, the Rusk W8less Professional 2000 Watt Dryer is one of the fastest and hottest dryers we tested. It weighs less than a pound, it has an 8-foot cord (one of the longest we found), it’s notably comfortable to hold, and overall it has the best combination of features we deem important—and that’s the case by far, even when you compare it with dryers that cost hundreds of dollars. The Rusk W8less comes with a concentrator, which is helpful for straightening hair. It does not come with a diffuser, however; if you use one for curly hair, consider our budget pick, which is faster but heavier and doesn’t get nearly as hot as the W8less.

Budget pick

Which hair dryer is least damaging?

If you don’t care about weight, consider the InfinitiPro by Conair 1875-Watt Salon Performance AC Motor Styling Tool. Commonly found in drugstores, this dryer produces airflow that’s faster (65 mph) than that of our top pick and almost as hot (205 °F). At 1.3 pounds, however, it may feel heavy after you spend a couple of minutes holding it above your head. The 6-foot cord, though shorter than those on our other picks, is longer than those on most other inexpensive hair dryers. The buttons are easy to use, but the cool-shot button is a little small and harder to hold down than the cool-shot button on our top pick. The InfinitiPro comes with both a diffuser and a concentrator.

Upgrade pick

Which hair dryer is least damaging?

Dyson Supersonic Hair Dryer

A joy to use

It’s expensive, but the unique design makes it extraordinarily nice to use: There’s no vibration whatsoever, and the simple-to-switch magnetic attachments make styling easier.

Buying Options

*At the time of publishing, the price was $400.

If you are willing to splurge on a dryer, you might consider the Dyson Supersonic Hair Dryer. It has consistently been our favorite to use since we first tested it in 2016. With airflow at 88 mph and a temperature surpassing 245 °F (the hottest temperature our weather meter could measure), the Supersonic doesn’t dry hair any faster than our pick, but it is more pleasant to use in almost every way due to its unique design. The motor sits in the handle, making the nozzle shorter and easier to maneuver. The handle doesn’t vibrate at all, which wasn’t true of other “luxury” models we tested. It has a long, 9-foot cord, and it’s less grating noise-wise than other dryers. It also comes with two magnetically attaching concentrators and a diffuser, all of which are exceptionally easy to add or remove mid-blowout.

Upgrade pick

Which hair dryer is least damaging?

RevAir

Best for thick, dense, or curly/coily/kinky hair

It’s pricey, it’s bulky, and it works—quickly and gently. For hair that’s fragile or difficult to blow-dry with a conventional hair dryer, the RevAir is worth considering.

Buying Options

*At the time of publishing, the price was $350.

Another spendy dryer, the RevAir, is unlike any other hair-drying, heat-styling tool we’ve tested. For people with Type 3 or 4 curl patterns especially, this vacuum-like device is gentle on fragile strands and can cut down total drying time significantly. One tester, who usually requires two back-to-back appointments with a professional stylist at Drybar, now achieves similar drying and smoothing results with the RevAir in as little as 20 minutes. The entire corded machine has an exceptionally large footprint compared with most other dryers: It weighs about 10 pounds in total and is the size of a small microwave. The hose-attached handheld wand alone weighs more than our heavier dryer picks (around 2 pounds), but we found that this is not terribly problematic because very little motion is required to use it.

Everything we recommend

Our pick

Which hair dryer is least damaging?

Rusk W8less Professional 2000 Watt Dryer

Fast and light

Our favorite hair dryer is lightweight and equipped with a long cord, and among the models we tested, it tied for blowing the hottest and fastest air. We like it just as much as dryers several times the price.

Buying Options

*At the time of publishing, the price was $110.

Budget pick

Which hair dryer is least damaging?

Upgrade pick

Which hair dryer is least damaging?

Dyson Supersonic Hair Dryer

A joy to use

It’s expensive, but the unique design makes it extraordinarily nice to use: There’s no vibration whatsoever, and the simple-to-switch magnetic attachments make styling easier.

Buying Options

*At the time of publishing, the price was $400.

Upgrade pick

Which hair dryer is least damaging?

RevAir

Best for thick, dense, or curly/coily/kinky hair

It’s pricey, it’s bulky, and it works—quickly and gently. For hair that’s fragile or difficult to blow-dry with a conventional hair dryer, the RevAir is worth considering.

Buying Options

*At the time of publishing, the price was $350.

The research

  • Why you should trust us
  • Who this is for
  • How we picked
  • How we tested
  • Our pick: Rusk W8less Professional 2000 Watt Dryer
  • Budget pick: InfinitiPro by Conair 1875-Watt Salon Performance AC Motor Styling Tool
  • Upgrade pick: Dyson Supersonic Hair Dryer
  • Upgrade pick: RevAir
  • Do ionic hair dryers work?
  • How to dry your hair
  • What about the Harry Josh Pro Tools Pro Dryer 2000?
  • What about the Dyson Airwrap and the Revlon One-Step?
  • What about paddle-style hair dryer brushes?
  • Other good hair dryers
  • What to look forward to
  • The competition
  • Sources

Why you should trust us

We interviewed two dermatologists to learn how heat styling affects hair: Melissa Piliang, who specializes in hair disorders at the Cleveland Clinic, and Rebecca Kazin, an assistant professor of dermatology at Johns Hopkins. We also spoke to Allen Ruiz, Aveda’s global director of hair styling; Perry Romanowski, a cosmetic chemist; and Jim Shapiro, an electrical engineer. We spoke to a second engineer at a large research university just long enough to get his informed opinion that there’s no obvious mechanism for a lot of the claims that hair dryer manufacturers make. In addition, we consulted hair-dryer-related patents.

Who this is for

Which hair dryer is least damaging?

Photo: Michael Hession

If you can’t leave the house with wet hair for aesthetic reasons or because it’s below freezing outside and you don’t want your head to be covered in icicles, you need a hair dryer. You also need one if you plan on using other hot tools on your hair: Make sure you’re really getting your hair dry if you’re going to take a flat iron to it (smushing hair between two hot pieces of metal is really bad for it if it’s still wet, according to our dermatologist sources). But even if you normally let your hair air-dry, blow-drying it could help protect it from breakage.

Despite what magazine lists and advertisements would have you believe (hair dryers for coarse hair! hair dryers for thin hair! hair dryers for dry hair!), hair dryers are one-size-fits-all. No dryer will make your hair more marvelously voluminous and glossy than another. What your hair looks like comes down to technique, products, and, in large part, its natural characteristics.

How we picked

Which hair dryer is least damaging?

An armful of the dryers we considered. Photo: Michael Hession

The packaging for hair dryers is adorned with a ton of buzzwords and specs. Most of these “features” are useless at best and pseudoscience at worst. There are no clinical studies examining whether one type of hair dryer is better for your hair than another—at least, none that we, nor the dermatologists we interviewed, could find.

For all the words and phrases associated with hair dryers—“tourmaline,” “ionic,” “ceramic,” “conditioning nano beads”—hairstylist Allen Ruiz told us he looks for two qualities in the appliance: “hot and fast.” (And that said, in our testing, differences in heat and speed from dryer to dryer often failed to noticeably affect the dry time.)

The hotness and fastness of a hair dryer are connected to the wattage, but they’re not perfectly correlated: A very high-wattage dryer can produce more heat than a lower-wattage one, but that doesn’t mean it will. Most hair dryers (including most of our picks) are about 1,875 watts anyway. And according to engineer Jim Shapiro, “Essentially all of the energy used by each dryer will be converted into heat, so don’t expect or look for much difference among the dryers here.” For all the buzzwords and superlatives you can find on the side of hair dryer boxes, the key specs don’t vary much from model to model.

Beyond heat and speed, we considered the following features:

  • Heat settings: Multiple settings are a must-have. They mean you don’t have to keep blasting your hair on high—and incurring more damage—once it’s mostly dry. And once your hair is totally dry, hitting the cool-shot button, according to many stylist opinions we read, helps seal your hair cuticle, keeping your hair feeling smoother. (Even if you don’t personally notice a difference, the cool air also feels nice when your head is hot.)
  • Cord length: An often-overlooked but important feature is a cord that reaches from the outlet you want to plug your dryer into all the way to the spot where you want to stand to dry your hair. Many bathrooms have an outlet near enough to the mirror that a short cord doesn’t matter. But if your mirror is more than three steps from an outlet, there’s no way around choosing a dryer with a longer cord; it’s unsafe to add an extension cord to a device that draws as large a wattage as a hair dryer. Avoid the problem by going with a longer cord in the first place. How long depends on your outlet situation, but in our testing a minimum of 6 feet was most comfortable.
  • Weight: The lighter the dryer, the easier it is to hold for a longer period of time. In our testing, a weight difference as small as two-tenths of a pound made a big difference in how a dryer felt overhead.

Weighing the dryers on a postage scale. Photo: Michael Hession

  • Attachments: The best dryers are compatible with diffusers and concentrators and preferably come with them. A diffuser is an attachment that helps dry curly, wavy, or textured hair gently so it maintains its natural shape. If you have straight hair or are trying to straighten your hair with a dryer, you don’t need a diffuser, though a concentrator attachment can help. See the How to dry your hair section for more info on how a diffuser can help minimize damage to your hair.
  • Removable filter: A hair dryer with a filter you can easily pop off the back is much easier to clean. Without a removable filter, cleaning is kind of a pain because you have to take the hair dryer apart (video).

Objective features aside, the main thing that separated the dryers we loved from those we didn’t was a bit harder to quantify: how they felt in our hands. In addition to weight, that overall feel depends on the following factors:

  • Button placement: Buttons that are placed either entirely on the front of the dryer or entirely on the back so they don’t poke your hand and are hard to hit accidentally make the experience of using a dryer nicer.
  • Handle shape: The wider and straighter the handle, the harder it is to grip, typically.
  • Sound: A dryer’s sound shouldn’t be annoying; most dryers operate at the same decibel level (59 to 90), but some dryers can make whinier noises than others.
  • Vibration: Dryers that don’t rattle and vibrate much have a more pleasant feel.

We did not consider folding or other “travel” hair dryers. Instead, we prioritized certain features, including nozzle length and body weight. Travel dryers sacrifice comfort (their handles are typically clunky) and have additional components that can break. Some of the truly compact ones offer a smaller design at the expense of solid wattage, the ability to attach a diffuser, and the inclusion of a cool-shot button. Judging from how budget dryers performed in our tests, we can say that any hotel hair dryer offering over 1,800 watts should give you the same results as a spendier one that you bring from home.

Ultimately, because we found so many dryers that fit our criteria during our first round of research, we chose to test an initial group of 15 models that had great reviews from other sources, such as Good Housekeeping (which, unlike most mainstream magazines, has a testing strategy for its recommended dryers), as well as Amazon, Sephora, and drugstore websites. In 2020 and 2021, we added to that original testing pool another 24 highly rated hair dryers.

How we tested

Which hair dryer is least damaging?

Our weather meter, which measured wind speed and temperature. Photo: Michael Hession

We took basic stats on our dryers, using a weather meter to test the speed and heat and a postage scale to weigh them. We also measured the cord lengths. Often our own readings disagreed with the manufacturer-stated specs. We found that on the top setting, most dryers blew air at about 40 mph as measured a couple of inches away from the nozzle. That blowing air was around 200 °F (more if we held the dryer in place for a few moments). Although some dryers achieved faster wind speeds than others, interestingly that didn’t end up translating to notably or consistently faster dry times once we used them on our hair.

For the initial iteration of this guide, we timed the models drying a swatch of hair from a wig wetted with 5 grams of water, with the dryers on their highest setting. We tested the dryer that had an on/off switch for ions, the Harry Josh model, in both positions. If there were big differences in the quality of the air a dryer gave off, they would show in these tests.

Two things became clear after our first round of swatch time tests: First, all of the dryers took more or less the same amount of time to dry hair. Little things, such as how close we held the dryer or how the hair moved around, were what really made the hair dry faster or slower. Second, in this round we also found that many of the dryers had designs that made them annoying to use. (See the Competition section for more details.)

With a few dryers eliminated, we put our favorites through some more time tests with the hair swatch and then brought them home for a couple of weeks and used them in our daily routines, timing how long they took to dry hair and feeling for any general differences in the quality of the resulting blowout. We found basically none. Many of the dryers we looked at had marketing copy claiming that they were some percentage faster than the competition and that they would leave hair looking better than the competition—promises often corroborated by Amazon reviews. There could well be a collection of slow dryers out there that make your hair look like crap and that everyone else is comparing these models with, but we didn’t seek them out.

Since originally publishing this review, we’ve continued to test our picks over the course of months and years for durability, paying mind to the subtle aspects of user experience that become apparent over long-term use.

Our pick: Rusk W8less Professional 2000 Watt Dryer

Which hair dryer is least damaging?

Photo: Rozette Rago

Our pick

Which hair dryer is least damaging?

Rusk W8less Professional 2000 Watt Dryer

Fast and light

Our favorite hair dryer is lightweight and equipped with a long cord, and among the models we tested, it tied for blowing the hottest and fastest air. We like it just as much as dryers several times the price.

Buying Options

*At the time of publishing, the price was $110.

The Rusk W8less Professional 2000 Watt Dryer offers all the features you need in a hair dryer while costing a fraction of the price of a luxury model. The W8less is one of the lightest, fastest, and hottest dryers we’ve tried (1 pound, 55 mph, and over 245 °F, respectively). Those are the only features that matter for drying your hair efficiently.

The Rusk W8less offers two speeds and three temperatures, plus a cool shot. Photo: Rozette Rago

The buttons are all nicely placed—easy to push but hard to press accidentally—and the cord is long enough (8 feet) to reach distant outlets. Unlike on other dryers, the cool-shot button is wide, so holding it down for several seconds isn’t uncomfortable.

The housing is nice: It’s glossy white, and the logo is understated. The handle is slightly curved, with a notch at the top. The sound of the air is smooth. The dryer comes with a concentrator, too.

Most important, the Rusk W8less takes about the same amount of time to blow-dry hair as dryers that cost hundreds of dollars. It’s capable of making your hair look just as nice as any other dryer.

The Rusk W8less comes with a two-year warranty.

Flaws but not dealbreakers

The Rusk W8less doesn’t come with a diffuser. If you have curly hair and prefer using a diffuser to dry it, you have to buy one separately (though it’s best to buy a hair dryer that comes with one, like our budget pick). We’ve seen the price of this dryer fluctuate a lot on Amazon, which can be frustrating if you’re taking your time to consider a purchase; on the other hand, you could score a surprise deal.

Budget pick: InfinitiPro by Conair 1875-Watt Salon Performance AC Motor Styling Tool

Upgrade pick: Dyson Supersonic Hair Dryer

Which hair dryer is least damaging?

Photo: Rozette Rago

Upgrade pick

Which hair dryer is least damaging?

Dyson Supersonic Hair Dryer

A joy to use

It’s expensive, but the unique design makes it extraordinarily nice to use: There’s no vibration whatsoever, and the simple-to-switch magnetic attachments make styling easier.

Buying Options

*At the time of publishing, the price was $400.

It’s no more effective than our other picks, but if you want the most pleasant hair-drying experience possible, the Dyson Supersonic Hair Dryer provides that. This dryer has an unusual design that makes it extraordinarily nice to use. It doesn’t vibrate whatsoever (all other dryers vibrate just a little, and the effect is not especially noticeable until you hold one that doesn’t), and its simple-to-switch magnetic attachments make styling with a diffuser or a concentrator easier. The dryer has a 9-foot cord.

The Dyson offers the fastest wind speed of all the dryers we’ve tested (88 mph measured at a distance of 2 inches) and ties our top pick for the hottest air at over 245 °F, the highest temperature our weather meter could measure. However, in our tests the air speed tangled our hair more, and Good Housekeeping found even the lower speed settings to be too strong. (For an additional $40, you can buy Dyson’s Gentle diffuser.) Although other reviewers (video) have found that the Dyson can sometimes dry hair a tad faster than the competition, after we put in a week of careful timed testing on our own hair, we found that this wasn’t consistently true: Drying hair with the Dyson sometimes took a bit longer than with our top pick.

The concentrator and diffuser attachments connect to the nozzle magnetically, a nifty feature we haven’t seen on any other dryer. They don’t get burning hot, as they’re made of two layers of plastic with a gap of air between them, so you can rotate or remove them mid-session, unlike on other dryers, where you must handle attachments carefully or angle the dryer awkwardly to switch them.

The attachments for the Dyson connect magnetically. Video: Sarah Kobos

Although the Dyson dryer’s feel and attachments are improvements over those of our other picks, we also found features we didn’t like and a few that we were neutral on.

The position of the speed and heat buttons on the back of the dryer’s head makes them hard to reach, and the cool-shot button is in an awkward spot at the very top of the handle. If you don’t change speeds and temperature a lot, though, the button locations might be a bonus, as they are hard to hit accidentally. Meanwhile, the cord has a small power bar near the plug, which itself is bulky.

The Dyson is different from most conventional hair dryers. (Air comes out the silver side.) Video: Sarah Kobos

The motor sits in the handle of the dryer, rather than in the head, and the handle is straight and a tad thicker than that of the Rusk. Dyson says the motor placement makes the weight of the dryer more balanced, since it’s not top-heavy. The difference isn’t huge, but over weeks of using the Dyson dryer, we found ourselves appreciating the configuration. If you have trouble gripping a typical dryer, the weight distribution of this one might make gripping easier, a reader told us.

The motor sucks air through a fine mesh from the bottom of the handle rather than through a grill at the back of the dryer, and the company claims it’s difficult for long hair to get stuck in the filter as a result. (Much of Dyson’s $71 million research and design tab for the dryer went into the motor, which is a smaller version of the motor found in Dyson’s handheld vacuum cleaners.)

At 1 pound, the Dyson Supersonic is the same weight as our top pick, the Rusk W8less. One tester found that the heavier cord tired out her arms when she was drying the top of her head, though resting the power bar (which most dryers do not have) on the counter helped. The sound the Dyson emits is a high-pitched whine with none of the low rattle that other dryers put out. Whether this sound is more pleasant, as the company claims, is a matter of personal opinion, though. As with any dryer, the sound of whooshing air is physically impossible to eliminate.

Despite the Dyson’s flaws, one tester found herself reaching for it consistently over our other picks in 2016, when she initially tested it, and again in 2018, when she did a second round of testing. Overall, compared with other dryers we’ve tested, this one truly feels like a luxury to use every day. If you decide that the Dyson dryer might be worth $400 to you, we recommend purchasing it from Sephora, which has a generous return policy. Dyson also sells refurbished versions of this hair dryer at reduced prices on eBay. These units carry a one-year warranty but are non-returnable.

Upgrade pick: RevAir

Which hair dryer is least damaging?

Photo: Rozette Rago

Upgrade pick

Which hair dryer is least damaging?

RevAir

Best for thick, dense, or curly/coily/kinky hair

It’s pricey, it’s bulky, and it works—quickly and gently. For hair that’s fragile or difficult to blow-dry with a conventional hair dryer, the RevAir is worth considering.

Buying Options

*At the time of publishing, the price was $350.

If you have hair that is damage-prone or very curly, or if it takes forever to blow-dry, the benefits of the RevAir might be worth its extra expense (for additional details, read our full RevAir review). This unconventional hair-drying vacuum is expensive, bulky, and loud, but it’s extremely effective, providing a particularly gentle, expedient way to dry your hair. It relies on “reverse air” suction to simultaneously dry, stretch, straighten, and smooth hair.

RevAir’s recent redesign trimmed down the device’s footprint and weight significantly without diminishing its capacity, but it’s still a different animal from the other, more conventional hair dryers we recommend, so comparing specs such as wind speed doesn’t make sense. But anecdotally, we found that this unique appliance consistently dried and straightened our tester’s curly hair much faster than any traditional dryer, with minimal tangling and hair shedding. Other reviewers’ reactions to the RevAir vary by hair type: For those with finer, less curly hair, it tends to be an appealing novelty (video) not necessarily worth shelling out for, while those with Type 3 or 4 curl patterns tend to find it revolutionary and worth the splurge (video).

It has a 5.5-foot hose that attaches to the same 9-inch heat-producing wand. At 2 pounds, the wand alone is heavier than any of our dryer picks. Rather than raising the dryer to your hair, however, you insert sections of your hair into the wand; the device then quickly and gently sucks the damp hair dry. It offers seven suction power levels and three heat settings (high, low, or the no-heat cool shot).

A sped-up GIF of the RevAir as it gently straightens, smooths, and sucks dry sections of 3C curly strands in a minute or less. Video: Nancy Redd

The RevAir has no purpose other than hair drying and straightening; it doesn’t accommodate (or need) attachments such as a diffuser or concentrator. It’s also huge. Unlike our other picks, it doesn’t easily fit in bathroom cabinets or on a countertop: Altogether it weighs eight pounds and is the size of a large toaster (plus the unwieldy hose).

The RevAir comes with a one-year warranty, half the coverage period of the Rusk W8less and the Dyson Supersonic.

Do ionic hair dryers work?

A common feature that hair dryer makers tout is the ability to make hair shinier. When we asked hairstylist Allen Ruiz about the best way to get shiny hair, he said: “Use a product that leaves the hair shiny and smooth.” Which is to say, shiny hair doesn’t really have anything to do with the dryer. Cosmetic chemist Perry Romanowski told us that the only things a blow dryer could do that styling products couldn’t were to “dry the hair more uniformly and keep hair straight.” Straight hair can be shinier hair: On straight hair, the cuticle—the outer, scaly layer of a strand of hair—lies flatter, reflecting light. But even if your goal is to have shiny, straight hair, the only dryer qualities that can help you achieve that more effectively are good old “hot and fast.”

You’ll see plenty of features—ceramic coils, an ion generator, tourmaline—noted in marketing materials and pretty much every other dryer buying guide. But those are features of nearly all dryers. We visited the hair dryer section of Sephora twice while writing this guide and failed to extract any logical reason from the salespeople as to why their curated selection of designer dryers were better than other options.

One thing that you should definitely avoid are retail employees who tell you that a $200 dryer is special “because it has ions.” Mainstream magazines and hair dryer packaging commonly promote ions as a feature that makes hair less frizzy and more shiny. Hair dryers do produce ions, which are just particles (of air, in this case) that are charged (negatively, in this case). We found a report in which a high school physics teacher put an ionic dryer in front of a device that measures ions, and lo, it found something to measure.

But because almost all hair dryers are “ionic,” it’s hardly a thing worth debating, except for academic clarity. Our tests (below) didn’t show any meaningful difference with ionic settings on or off.

Engineer Jim Shapiro’s opinion: “Ions? Please.”

Ions are technically able to reduce frizz—but only frizz from static. If you brush your hair while blow-drying it—or you just exist, in the winter months, depending on your hair—positive charge can build up, causing strands to repel away from your head and stick out. But wet hair cannot hold a charge. A blast of negative ions from a hair dryer on dry hair would bring it back to a neutral charge, but if you have a huge static issue, you can also just use a smoothing cream (which is easier to fit in a bag anyway) or a tiny bit of water.

Another claim regarding ions is that they can break up water molecules and speed up drying time. We couldn’t find any reason this would be the case, and neither could the engineers we spoke to. Doctor and prominent skeptic Ben Goldacre has questioned the ions-make-water-droplets-smaller phenomenon, too, on his blog Bad Science. Still, for good measure, we planned to test an ion-button-equipped dryer with and without ions in effect, just to see for ourselves if we were missing something.

Which hair dryer is least damaging?

The ion button on the Harry Josh dryer, far right. Push for ~*science*~. Photo: Michael Hession

Finally, sometimes makers of hair dryers with an on/off ion button claim that the feature is there so that you can use the dryer with the ion button set to “off” for fine hair to make it more voluminous. This could possibly work only if you were going for the kind of volume produced by static electricity.

As for other features, the dermatologists we interviewed recommended ceramic-coated coils. They provide “a more even heat” than other materials, according to Melissa Piliang. All hair dryers work by heating up an element, such as a metal coil, and then blowing air over it, carrying the heat to your head. Ceramic material does heat up faster and radiate heat more evenly than iron or nickel. (Many space heaters also employ ceramic elements.) But the engineers we spoke to were skeptical that this component makes much of a difference in drying hair: Radiant heat isn’t really helpful “unless you expect to direct the heat far from the dryer,” said Shapiro, such as if you were trying to use a dryer to heat a room for some reason. Any heating element in a dryer gets the heat to your head via the blowing air. And though ceramic material does heat evenly, we couldn’t feel a difference in the heat coming from the dryers we tested with ceramic coils versus those made with other materials. Regardless, you should move your dryer around as you do your hair, so the exact evenness of the heat coming from the dryer doesn’t matter too much. The bottom line is that most hair dryers have ceramic-coated elements anyway; don’t let a box’s claims fool you into thinking you’re getting something special.

Another material commonly found inside hair dryers is the mineral tourmaline, which is supposed to help reduce frizz. Even a piddly little wall-mounted hair dryer in a hotel one tester stayed at while writing this guide claimed to have it. The mineral is very pretty, but as Shapiro said: “Tourmaline? Please, squared.” It’s impossible to see the tourmaline because it’s ground up and in the barrel of the dryer, and it doesn’t have to be present in large amounts to be advertised on the box: Patents for gemstone dryers that we read involve a slew of minerals that manufacturers use to coat the inside of the dryer. Rebecca Kazin told us that she looked for tourmaline in a hair dryer but that there were no clinical studies on its being better for hair. Her exact words were: “I believe in tourmaline.” We read—in a patent—that heated tourmaline can emit electromagnetic radiation that can alter the structure of your hair. The person who holds that patent also has one for a device that diagnoses “body deficiencies” (the patent is not specific, but it does say you treat them with drugs) by measuring a person’s electromagnetic field. (Patents can give you a great idea of how something is supposed to work but are not necessarily fact-checked for scientific accuracy.)

You can ignore claims about “conditioning nano beads” or “silk proteins” that are, supposedly, infused in the heating elements and barrels of some dryers. “That is just marketing hype,” Romanowski said.

How to dry your hair

To our surprise, we found that blow-drying might be better for hair than air-drying, for a couple of reasons. Extended contact with water causes the stuff in between a hair’s cuticles, called the cell membrane complex, to swell and bulge, weakening the hair slightly. As a result, putting your hair up in a ponytail when it’s wet can cause breakage, as dermatologist Rebecca Kazin pointed out, because the strands are weighed down with water. One small study found that blow-drying while holding the dryer 6 inches away from your head actually causes less overall damage than air-drying. Using a hair dryer still causes more damage to the outer layer of hair, but if breakage is a problem for you, blow-drying your hair on a low setting could be helpful.

Dermatologist Melissa Piliang advised that “it’s best to embrace your natural texture” and not fight it when you are choosing how to dry your hair, because doing so can make it frizzier over the long run. Ads for hair products and articles in mainstream magazines like to equate healthy hair with smooth and shiny hair. But shininess isn’t the same as health—we checked with dermatologists.

All hair dryers cause some damage. Hair cuticles are “kind of like shingles on a roof,” Piliang explained. Heat causes them to dry out and peel up, which can let in moisture and increase frizz. Some hair is just naturally more dry to begin with, which means it starts out more prone to frizz.

Clipping up hair and blow-drying in sections can help hair dry faster and minimize damage. Photos: Michael Hession

To minimize damage, Piliang advises decreasing the overall time you have to spend pointing hot air at your hair by towel-drying it first. Then, blow-dry it in sections. Clip some of your hair up in a half ponytail, dry what’s underneath, and then undo the ponytail so you’re not just subjecting the same dry strands to direct heat. While you’re drying, hold the blow dryer so that it shoots air downward, with the grain of the hair cuticle, rather than against it. Although no conventional dryer we’ve tested has proven notably faster than another, following this method (versus drying hair without pinning it up and going in sections) reliably saves us a couple of minutes in drying our hair.

Don’t keep blasting your hair with the highest heat setting, Piliang said. When your hair is almost dry, turn the dryer to a lower setting. (Cooler air takes a little longer to finish drying hair; personally, we’re too impatient for this.) Also, don’t use a metal round brush to style your hair, she told us; it just transfers heat directly to your hair, which is bad for the cuticles. Use a plastic brush and “keep things moving,” she said, so you’re not blasting any one spot with heat for too long.

Which hair dryer is least damaging?

A diffuser swirls the air coming out of a dryer so that it can dry curly hair more gently without requiring a brush. Photo: Michael Hession

If you have curly hair, don’t brush it as you are drying it, as that will just ruffle the cuticle (unless you are trying to straighten it). A diffuser will help you work with your natural hair shape, an approach that is less damaging to your hair than trying to make it do something it doesn’t naturally do. Most, but not all, blow dryers are at least compatible with a diffuser, and you can buy one easily if one doesn’t come with the dryer. “I prefer a diffuser with ‘fingers’ in it for creating really defined curl,” hairstylist Allen Ruiz told us. “You want to work section by section and make sure to tilt and lean your head as you go, gently [putting each] section of curls into the diffuser.” (Here’s a video that shows what he means.)

What about the Harry Josh Pro Tools Pro Dryer 2000?

What about the Dyson Airwrap and the Revlon One-Step?

The Dyson Airwrap is a multipurpose styling tool with a number of attachments that can curl, straighten (with a brush), or blow-dry hair (with an add-on that looks like a thinner, oval version of the Supersonic head). We haven’t taken a wind meter to it, but the company says the dryer-attachment-equipped Airwrap is not as powerful as the Supersonic and is meant to get hair a bit dry before you use the other attachments, which, unlike most other curlers and straighteners, can work on damp hair. It also isn’t compatible with a diffuser or concentrator.

Three testers with different hair types and textures had polarized opinions on the $550 Airwrap, especially when comparing their brush-attachment blowout results with those they achieved with the $60 Revlon One-Step Hair Dryer and Volumizer, a revered hot-air brush that’s a best seller on Amazon. Neither the Airwrap nor the One-Step Hair Dryer and Volumizer is a standard hair dryer, so we didn’t compare them against our picks for this guide. We did attempt to test the styling tools against one another, but we found that comparison, well, hairy.

What about paddle-style hair dryer brushes?

Hair dryer brushes like the Revlon One-Step Hair Dryer and Volumizer circulate heated air from within, through holes between the bristles. They are designed to replace the pairing of a traditional hair dryer with a separate brush. Most hair dryer brushes are cylindrical in shape and have 360 degrees of bristles, as round styling brushes do. However, some people find paddle-style hair dryer brushes gentler and better for detangling than cylindrical models, since this brush style may reduce snagging. Because the bristles and airflow are restricted to one side of a paddle-style hair dryer brush, you have more control over the amount of heat you apply to your hair. This control comes at a cost, though: Paddle-style hair dryer brushes are notorious for being unable to reach hair roots, and it often takes longer to dry a full head of hair with one than it does with either a round hair dryer brush or a traditional hair dryer. However, paddle-style hair dryer brushes do a decent job of drying and straightening hair, especially when you’re preparing hair for a second round of styling (with a curling iron, straightening comb, or braids).

We tried four paddle-style hair dryer brushes, finding the best overall to be the Conair InfinitiPro Hot Air Paddle Brush. Although we recommend the vacuum-style RevAir dryer for people with more fragile strands, for around a tenth of the price the Conair is a decent and similarly gentle option for hair drying and straightening. Despite having the lowest wattage of any of the paddle hair dryer brushes we considered (600 watts), it dried hair sections almost as quickly as the brush we tried with the highest wattage: the Instagram darling EZ Dryer Ion (1,200 watts). This result may be due to two factors unique to the Conair brush, namely its slimmer oval shape (most paddle brushes are wide and rectangular) and a combination of different bristle materials and lengths, all of which make it much easier to dry hair closer to the scalp. Like all of the paddle-style hair dryer brushes we tested, the Conair has three heat settings (high, low, and cool). At less than 11 ounces, it ties with the EZ Dryer Ion for the lightest of the paddle-style models we tested. The Conair has a 5-foot cord and comes with a two-year warranty.

The EZ Dryer Ion is the most effective and efficient paddle-style hair dryer brush we tested. But because it’s missing markings for the air-temperature settings, determining at a glance which setting the brush is on is impossible. More important, it lacks an ALCI (appliance leakage current interrupter) safety plug, so if it shorts or is immersed in water, the device won’t automatically turn off and therefore could cause an electrical shock. It’s covered by an ultrashort (14-day) warranty, too.

Other good hair dryers

If you can’t find the Rusk W8less in stock: The BaBylissPro Porcelain Ceramic Carrera2 Dryer is a great substitute. Priced at $100 (though often on sale), it’s not much more expensive than the W8less, but at a pound and a half, it ties with the Conair Pro Yellow Bird for the heaviest dryer we’ve tested. With speeds reaching 60 mph, it’s almost as fast as the W8less (65 mph), and like the W8less it can reach temperatures over 245 °F (the hottest our weather meter could measure). It also has an extra-long cord measuring 9 feet 10 inches—nearly 2 feet longer than the W8less’s cord. Like the W8less, the Carrera2 comes with only a concentrator (not a diffuser) and has two speeds, three temperatures, and a cool shot.

If the Conair InfinitiPro 1875-Watt Styling Tool, our budget pick, is unavailable: The Revlon Turbo-Speed Hair Dryer is an inexpensive, extremely lightweight, serviceable hair dryer. Costing $25 (often on sale for $15 or so) and weighing under a pound, it’s one of the least expensive yet one of the lightest dryers we’ve ever tested. It’s also one of the slowest of the dryers we like (41 mph), and it has the shortest usable cord (5 feet 6 inches). However, the Turbo-Speed is one of the hottest dryers we’ve tested, reaching over 245 °F in just a few seconds, blowing the InfinitiPro’s 205 °F out of the water. It has only two speeds (in contrast to the InfinitiPro’s three), and whereas our budget pick comes with both a diffuser and a concentrator, the Turbo-Speed has only a diffuser. This inexpensive Revlon model is polarizing—people either love it or hate it—and a few damning owner reviews claim that it melts, burns hair, and poses a fire hazard.

If you have Type 4 (coarse and curly) hair and don’t want to shell out for the RevAir: The retro-looking Conair Pro Yellow Bird Hair Dryer is a cult favorite. It’s one of the hottest dryers we’ve tested (reaching over 245 °F), but at a pound and a half, it also ties for the heaviest dryer we’ve looked at. Its buttons are strangely placed and unlabeled, but it’s the only dryer we like that comes with a straightening pick. It also comes with a diffuser, offers four speeds and temperatures (no cool shot), and has a cord measuring an ample 7 feet 10 inches.

What to look forward to

We’re evaluating the Shark HyperAir, which has a variety of attachment options. (including a styling brush that customer reviewers rate highly), and weighs around as much as the Dyson Supersonic. We’re also testing the Shark FlexStyle, a multipurpose styling tool much like the Dyson Airwrap. We will report our full findings here.

The competition

The Rusk Pro Speed Titanium Hair Dryer, which the company suggested as a replacement for the discontinued CTC Lite model we previously recommended, is nearly double the price of the Rusk W8less and has the same cord length, heat settings and speeds, and two-year warranty. It does, however, always come with a diffuser (the W8less does not).

The wind emitted by the lightweight Trezoro 9300, an Amazon bestseller, is very fast and hot (especially for the dryer’s price). However, customer service is only reachable via a Hotmail address. We think the less-expensive InfinitiPro by Conair is a better value overall.

In comparison with the Rusk W8less, the Amika Accomplice Compact Dryer is heavier, limited to a lower max temperature (215 °F), and double the price. However, its 9.5-foot cord ties with that of the GHD Helios for the second-longest cord among the dryers we’ve tried.

At 1 pound, the BaBylissPro Rapido Dryer is an ultra-lightweight dryer, and it comes with a 9-foot cord, but it’s slower and over double the price of the Rusk W8less. (We’d go with the company’s Carrera2 over this one if we had to choose between the two.)

Of the Dyson Supersonic lookalikes, the Karrong F350 seemed the most promising to us, but it ended up being half as fast, with no way to control speed separately from temperature—the hotter it got, the faster it got. Also, there was no warranty information to be found.

At an impressive 11 feet long, the CHI Touch 2 Dryer’s cord is the longest of any dryer we’ve tested, but this dryer is more expensive and much slower than the Rusk W8less. It also has a mere one year of warranty coverage, and its non-intuitive touchscreen felt gimmicky.

The lightweight and long-corded Hot Tools Professional Black Gold Turbo Ionic Salon Dryer is a little heavier and not as fast as the Rusk W8less, and it’s typically more expensive, too. On top of that, owner reviews allege poor longevity. (This dryer is covered by a whopping seven-year warranty, though.)

The Hot Tools Professional Black Gold Turbo Ionic Salon Dryer (DC Motor) is extremely light at only 14 ounces. But it also has the most buttons and slides and switches of any hair dryer we’ve ever tested, including a cool-shot button, a power-boost slide, an ion select wheel, switches for speed and temp—whew! It’s also one of the slower dryers we’ve tested.

The Revlon 1875-Watt Infrared Hair Dryer produced a wind speed of 45 mph (measured directly in front of the nozzle), slower than the speed we got from our picks. It weighs just over a pound, has a cord measuring 5.5 feet, and comes with a concentrator and a diffuser. But the mediocre specs, along with the gimmicky red lights that flash while you’re blow-drying, kept this dryer from being a pick, even though it was a particularly inexpensive model at the time of our tests.

Although the 1,875-watt Revlon Compact Styler is a wallet-saver at around $10, the savings do not make up for the dryer’s added heft, its lack of attachments, and its reduced wind speeds compared with our picks.

The Bio Ionic 10X Ultralight Speed Dryer is a tad lighter (0.92 pound) than our top pick and has a slightly longer cord. However, the dryer doesn’t have separate wind-speed and temperature-control settings (if you want hot air, it must also be fast).

The Drybar Buttercup Blow Dryer is heavier than our picks, at 1.3 pounds. The air speed is also slower, at just over 30 mph measured at a distance of 2 inches.

Amazon customer reviews of the 1,900-watt Parlux 3200 Hair Dryer were pretty good at the time of our research, and the compact design is nice. But the buttons on this model are positioned on the side, and they made the dryer hard for us to hold without getting poked in the hand.

The DevaDryer by DevaCurl is slower and heavier than our picks. However, after a few wash-and-go tests, our curly-haired testers found that they liked using the included DevaFuser attachment, a unique hand-shaped diffuser that helps dry curls and waves without losing definition. You can buy a universal-fit version of the DevaFuser for any attachment-compatible hair dryer.

The Conair 1875-Watt 3-in-1 Ionic Styler has a long row of grills (and a brush attachment) instead of a circular nozzle. It gives you no way to attach a diffuser, which means you’re stuck with a single-purpose dryer.

Sources

  1. Yoonhee Lee, MD, et al., Hair Shaft Damage from Heat and Drying Time of Hair Dryer, Annals of Dermatology, November 3, 2011

  2. Jason English, The Ionic Hair Dryer, The Physics Teacher, September 25, 2007

  3. Perry Romanowski, cosmetic chemist, email interview, October 22, 2015

  4. Jim Shapiro, engineer, email interview, September 1, 2015

  5. Melissa Piliang, MD, dermatologist at the Cleveland Clinic, phone interview, September 29, 2015

  6. Rebecca Kazin, MD, assistant professor, Johns Hopkins Department of Dermatology, phone interview, October 2, 2015

  7. Allen Ruiz, global director of hair styling, Aveda, email interview, October 8, 2015

  8. Stephanie Saltzman, Expert Tips for a Better (Faster) Blowout: How to Pick the Right Hair-Dryer, Allure, March 20, 2013

  9. Devri Velázquez, How to Use a Diffuser Without Ruining Your Curls, NaturallyCurly, June 11, 2018

About your guides

Which hair dryer is least damaging?

Nancy Redd is a senior staff writer at Wirecutter covering everything from Santa hats to bath bombs. She is also a GLAAD Award–nominated on-air host and a New York Times best-selling author. Her latest picture book, The Real Santa, follows a determined little Black boy's journey to discover what the jolly icon truly looks like.

Which hair dryer is least damaging?

Further reading

  • Which hair dryer is least damaging?

    The Best Hair Straightener

    by Hannah Waters and Tiffany Kelly

    We've tested 11 hair straighteners on four heads of hair, and we’ve found that the GVP Ceramic Titanium Digital is the most maneuverable full-size flat iron.

  • Which hair dryer is least damaging?

  • Which hair dryer is least damaging?

  • Which hair dryer is least damaging?

What hair dryer does the least damage to your hair?

Keep scrolling to see 7 hair dryers that will work efficiently without inflicting excess damage on vulnerable hair..
DevaCurl. DevaDryer and DevaFuser Dryer & Diffuser Combo. ... .
Parlux. PowerLight Ionic and Ceramic Professional Hair Dryer. ... .
T3. ... .
Dyson. ... .
Revlon. ... .
Remington. ... .
Harry Josh Pro Tools. ... .
Pattern Beauty..

What is the healthiest hairdryer?

The best hair dryers you can buy in 2022.
BaByliss 2100 W Salon Light Hair Dryer. ... .
ghd Helios Hair dryer - Professional Hairdryer (limited edition fresh lilac) ... .
Remington Keratin Protect Ionic Hair Dryer, Infused with Keratin and Almond Oil for Healthy Looking Hair - AC8008, Silver..

Is ceramic or ionic hair dryer better?

By understanding the technology behind both dryers, we can conclude that ceramic hairdryers are better than ionic hairdryers because ionic hairdryers build an electromagnetic field to emit negatively-charged ions and this electromagnetic field is dangerous for long time use.

Which hair dryer is safe?

Tourmaline and titanium hair dryers are 50 times faster than other dryers. Ceramic hair dryers are considered as safe hair dryers and are also best suitable for frequent users, for long, thick and curly hair types.