What to Wear in a Sauna: The Honest Answer for Gyms, Spas and Your Own Backyard

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There is no single answer to what to wear in a sauna, because the question is really about where the sauna is. In your own cabin, the honest answer is a towel and nothing else. In a US gym it is a swimsuit or shorts, because that is what the club's own rules say. In a Finnish sauna the towel is the rule and the clothing is optional. Three different answers, one shared piece of physics underneath them, and one garment you should never bring into any of them.

We have had a Canadian cedar barrel sauna in the backyard for three years and use it two or three times a week, usually after a session in the ice bath. That is the experience this page is built on: what actually works on a hot bench, over a long stretch, in a sauna we own. The specific products below are a different matter. Those we picked from live Amazon listings on 19 August 2026 on published materials, dimensions and rating history, not from having worn each one ourselves. Where a claim is ours, we say so. Where it comes from a manufacturer or a public health source, we cite it.

Last reviewed: August 2026

Quick comparison

Prices, ratings and materials read off each product's live Amazon listing on 19 August 2026 and they move, so confirm the current price before you buy. Ratings are Amazon's own star average; several of these listings price differently by colour and size.

Why the fabric matters more than the coverage

Everything you have ever read about sauna clothing comes down to one mechanism, and once you understand it the rules stop being arbitrary.

In a traditional sauna at 150–195°F, the air is hotter than you are. Conduction and convection are not cooling you; they are heating you. The only route your body has to shed heat is evaporation — sweat leaving your skin as vapour, taking energy with it. That is the whole system. In a 120–140°F infrared cabin the maths is gentler but the mechanism is identical.

So the useful question about any garment is not whether it looks appropriate. It is: does this let sweat evaporate off my skin, or does it trap it?

Cotton and linen absorb sweat and pass moisture through, so they sit wet against you without sealing anything. Wool does the same and insulates, which is why it ends up on heads rather than bodies. Polyester, nylon and elastane absorb almost nothing. They hold sweat as a film between fabric and skin, which is uncomfortable rather than dangerous, and they dry slowly afterwards.

And at the far end, deliberately, are vapour-impermeable garments: sauna suits, plastic wraps, anything designed to make you sweat more by stopping the sweat leaving. Those do not merely feel worse. They remove the mechanism.

Two things people worry about that are not real. Synthetic fabric does not melt in a sauna. Polyester's melting point is around 480°F (250°C), well over twice the temperature of the hottest traditional sauna, and no sauna gets close. And a swimsuit will not somehow leach chemicals into you; the reason Nordic pool saunas discourage them is chlorine and detergent smell coming out of the fabric in the heat, which is an etiquette problem, not a toxicology one. The real cost of synthetics is comfort, odour and fibre life. Elastane is the fibre that suffers first, which is why a favourite sports bra taken into a sauna twice a week stops holding its shape long before a cotton wrap wears out.

What to wear, by setting

Your own sauna at home

A towel to sit on. That is the complete answer, and it is what we do.

The towel is not modesty, it is hygiene and comfort: wooden benches absorb sweat, and cedar at 180°F is hot enough on bare skin to make you sit strangely for the first minute. One large flat-weave cotton towel under you solves both. Whether you wear anything else is genuinely up to you, and in a private sauna nobody has an opinion worth accommodating.

If you use it with other people, the same towel rule applies to everyone, and it is easier to keep two or three cheap peshtemals in rotation than to wash one after every round.

A US gym

Wear clothing, because your club almost certainly requires it. Rules vary by chain and by location, so the posted sign at your gym beats anything on the internet. But they rhyme. 24 Hour Fitness publishes that it "requires you to shower before using the pool, whirlpool, sauna or steam room", that it "requires you to wear appropriate clothing and footwear while in its facilities", and that "shower shoes and swimming suits are all right in the pool area". It also bars photography or filming anywhere in the locker room, steam room or sauna areas.

The practical kit: a swimsuit or clean, dry shorts and a T-shirt; a towel to sit on; a second towel to dry off; slides for the walk there and back. Do not go in wearing the clothes you just trained in. They are already saturated, they will smell within a minute of the heat hitting them, and they hold heat against your skin rather than letting it go.

Footwear off in the sauna, footwear on everywhere else. The American Academy of Dermatology's standing advice for avoiding athlete's foot is to wear shower shoes or sandals around pools, gyms, showers and locker rooms. Those floors are warm, wet and heavily trafficked, which is the exact environment the fungus wants.

A spa or a mixed-sex public sauna

A swimsuit or a cotton wrap, plus a towel. In mixed settings, coverage is the expectation and a wrap with a fixed closure is easier than a towel you keep re-tucking, especially if you are moving between a sauna, a plunge and a lounger.

If you travel to a Nordic or German sauna, the norms flip. Single-sex saunas are usually nude, the towel under you is effectively mandatory, and swimsuits can be discouraged or barred because of what comes out of the fabric in the heat. Bringing a towel and following whatever everyone else is doing covers you in every version of this.

What not to wear, in order of how much it matters

1. A sauna suit, or anything vapour-impermeable. This is the only genuinely dangerous item on the list. On 20 February 1998, the CDC's Morbidity and Mortality Weekly Report (1998;47(06):105–108) documented the deaths of three previously healthy collegiate wrestlers between 7 November and 9 December 1997, all cutting weight for competition. All three "restricted food and fluid intake and attempted to maximize sweat losses by wearing vapor-impermeable suits under cotton warm-up suits and exercising vigorously in hot environments." One of the three was found to have a rectal temperature of 108°F (42°C) at the time of death. The report's explanation of the mechanism is one sentence long: body temperature rises with exercise and dehydration, and "is further increased by use of vapor-impermeable suits that decrease evaporative and convective heat loss." The NCAA's response was to prohibit hot rooms above 79°F, hot boxes, saunas, steam rooms and vapour-impermeable suits for weight-cutting outright.

Those three deaths involved vigorous exercise as well as heat, so this is not a claim that sitting quietly in a sauna suit will kill you. It is the reason the combination is banned at collegiate level and the reason no serious sauna guide should treat a sauna suit as sauna equipment. If you own one, use it for what it was sold for and leave it out of the hot room. Our sauna and workout timing guide covers the sequencing question this usually sits behind.

2. Metal jewellery. Rings, chains, watches, piercings. Metal in a 180°F room reaches the room's air temperature and conducts heat into skin far faster than cloth or wood, so a steel chain that is merely warm in the changing room is unpleasant on your collarbone ten minutes in. Take it off and leave it in the locker.

3. Street shoes and trainers. Off at the door. It is a hygiene rule everyone else in the room is relying on.

4. The clothes you just worked out in. Saturated fabric plus heat is the fastest way to make a shared room unpleasant, and a wet synthetic layer is the opposite of what you want against your skin.

5. Makeup. Heavy sweating with a full face on is a bad combination, and it is the one point where the "open your pores" folklore has a practical edge to it. Wash it off first. We go further into heat and skin in our sauna for skin guide.

6. Contact lenses. Dry heat pulls moisture off the surface of the eye and lenses get uncomfortable quickly. Glasses are worse. Metal frames get hot and plastic ones fog solid. Most regular sauna users simply go without and accept the blur.

The kit, item by item

WETCAT Turkish Beach Towel: the one thing everyone needs

~$24 · 100% Turkish cotton · 71" × 38" · 4.6 stars from roughly 13,400 Amazon ratings

If you buy one thing on this page, buy a flat-woven Turkish cotton towel, a peshtemal, and stop using a bath sheet. The difference is weight and weave. A thick American terry towel holds a lot of water, takes hours to dry in a humid changing room and is bulky to wrap. A peshtemal is flat-woven, dries fast and folds down to almost nothing, which is the whole reason the design exists in bathhouse cultures.

At 71 by 38 inches this one is long enough to sit on a bench with room either side, and it wraps on an adult without a fight. Amazon's manufacturer data lists it as 100% Turkish cotton at 0.2 kg, made in Turkey, machine washable and tumble dry low. Hot washing matters, because a sauna towel needs to come out genuinely clean rather than just rinsed.

Pros: longest rating history of any towel we looked at, at 4.6 stars across roughly 13,400 ratings; large enough to sit on and wrap; dries fast; light enough to keep two in a gym bag. Cons: flat weave feels thin if you expect a plush bath towel; light colours show wear.

Best for: everyone, in every setting on this page.

Check price →

DEMMEX Organic Diamond Peshtemal: the second towel

~$24 · 100% organic Turkish cotton, Oeko-Tex certified · 71" × 36" · 4.6 stars from roughly 6,700 ratings

You want two towels, not one. One goes under you and gets soaked; the other stays dry for afterwards. Swapping between rounds with a single wet towel is the small annoyance that makes people stop bothering with the bench towel at all.

This is a near-identical proposition to the WETCAT with an Oeko-Tex certification on the cotton, listed at 71 by 36 inches and 15.2 ounces. Prewashed, which means it arrives at close to its final size rather than shrinking a couple of inches on you.

Pros: Oeko-Tex certified organic cotton; prewashed so sizing is predictable; same fast-drying flat weave. Cons: an inch or two narrower than the WETCAT; white shows every mark.

Best for: the dry towel in a two-towel rotation, or a matched pair if you share the sauna.

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ASKOLD Wool Sauna Hats, 2-pack: for hot, dry saunas

~$18 for two · 100% wool felt · hand wash only · 4.4 stars from 384 ratings

The first time you see one, a wool hat in a hot room looks like a joke. It is not. Heat stratifies inside a sauna, so the air around your head on the top bench is significantly hotter than the air at your feet, and your scalp is what tells you the session is over. Wool is an insulator; a felt hat slows how fast that air heats your head, which buys you a more comfortable stretch on the bench and takes some of the dry heat off your hair.

This is standard equipment in Russian banya culture and common in Finland. It is worth being clear about the claim: a sauna hat makes hot sessions more tolerable and is kinder to hair. We have not seen evidence that it changes anything about the physiological response, and anyone selling it that way is overreaching.

Amazon's manufacturer data lists these as 100% wool, medium weight, no stretch, hand wash only. The two-pack matters more than it sounds. Wool felt takes a while to dry, so a spare means you are not putting on a damp hat.

Pros: two hats for under $20; genuine wool felt rather than a synthetic lookalike; makes 190°F sessions noticeably easier on the head. Cons: hand wash only; one size, so fit is approximate; pointless in an infrared cabin at 120–140°F.

Best for: traditional and wood-fired saunas above about 180°F. If you are choosing between the two heat types, our traditional vs infrared comparison covers what changes.

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Turkish Cotton Terry Velour Body Wrap: men, gym and spa

~$22 · 100% cotton terry velour · one size, adjustable closure · 4.5 stars from roughly 2,600 ratings

A wrap is the middle ground between a towel and a robe: coverage you do not have to hold shut, in a fabric that behaves in heat. The adjustable closure is the entire point. A towel needs re-tucking every time you stand, and in a public sauna that is the thing that makes people self-conscious enough to wear gym shorts instead.

100% cotton terry velour, machine washable, sold as one size with an adjustable fit. It is heavier than a peshtemal, which makes it better for walking between the sauna, the showers and the pool deck and worse for stuffing into a bag.

Pros: stays put; cotton throughout; the practical answer for men in a mixed facility. Cons: terry is slow to dry compared with flat weave; one-size fit will not suit everyone; sit on a separate towel rather than on this.

Best for: men at a gym or spa who want more than a towel and less than a robe.

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Turkish Linen Waffle Spa Body Wrap: women, gym and spa

~$14 · waffle cotton · 59" × 30" · adjustable closure · 4.4 stars from roughly 11,000 ratings

The same idea in a waffle weave, which is lighter and dries faster than terry. Listed at 30 by 59 inches with an adjustable closure, and priced low enough that owning two is reasonable.

Waffle is the sensible fabric for this job. It is a cotton weave with a lot of surface area and very little bulk, so it holds shape while wet and dries between sessions rather than staying clammy in a locker.

Pros: cheapest item here at around $14; long rating history at 4.4 stars across roughly 11,000 ratings; dries faster than terry. Cons: thinner than terry and less warm afterwards; sizing runs to a standard adult fit; prices vary by colourway.

Best for: women at a gym or a mixed spa, and anyone who wants a wrap they can wash constantly.

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adidas Adilette Shower slides: for the walk, not the bench

~$21 · moulded synthetic, quick-drying · 4.4 stars from roughly 22,400 ratings

Not sauna wear. Locker-room wear, and the reason it is on this list is that the floor between the changing room and the sauna is the actual hygiene risk in a public facility, not the sauna itself. The American Academy of Dermatology's advice for preventing athlete's foot is to wear shower shoes or sandals around pools, gyms, showers and locker rooms. Warm, wet, high-traffic floors are exactly where the fungus and plantar warts spread.

The Adilette Shower is the default for a reason: one moulded piece, nothing to hold water, dries in minutes, and 4.4 stars across roughly 22,400 ratings. Any quick-drying slide works. The rule is that they come off at the sauna door.

Pros: the most-reviewed option in the category; nothing absorbent to go sour; cheap enough to leave in a gym bag permanently. Cons: synthetic, so do not wear them in the sauna; sizing runs long, which is a common note on adidas slides.

Best for: anyone using a gym, pool or public sauna.

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Amazon Essentials Waffle Robes: the cool-down layer

Women's ~$22 · men's ~$26 · lightweight waffle cotton · 4.5 stars from roughly 14,700 and 11,200 ratings respectively

A robe is not sauna wear either. It is what you put on between rounds, and if you follow a sauna with cold exposure it becomes the most-used item you own. Standing outside in a Northern winter after a plunge is where a robe earns its money.

Lightweight waffle is the right build. A heavy towelling robe is a sweat trap and takes a day to dry; waffle weighs almost nothing, holds warmth without smothering, and dries between sessions. The women's version is full length, the men's mid-length, both from Amazon's own line at the price where a robe stops being a luxury purchase.

Pros: the highest-volume robe listings on Amazon at 4.5 stars; light enough to actually dry; cheap enough to own alongside a wrap. Cons: waffle is not warm enough for standing outside in deep winter; not a sauna garment, so take it off at the door.

Best for: the gap between rounds, and the walk back from the cold plunge. Our contrast therapy guide covers how long that gap should be.

Check price, women's → · Check price, men's →

Buyer's guide

Buy cotton or linen, and ignore the marketing. Bamboo viscose, microfibre and "quick-dry travel towels" are all synthetic or heavily processed, and they do the same thing a swimsuit does, which is hold a wet film against your skin. Turkish cotton in a flat weave is the traditional answer because it works.

Buy two towels, not one. The single most common mistake is one towel doing both jobs. Wet under you, wet on you afterwards.

Flat weave over terry for the bench, terry for warmth. A peshtemal is thin, long and dries fast, which is what a bench towel needs. Terry is plusher and warmer, which is what you want after.

Size for the bench, not for you. A towel you sit on wants to be around 70 inches long, so it covers the seat and where your feet go. Both towels here are 71 inches for that reason.

Wash hot, and often. A sauna towel absorbs sweat every session. Every product here is machine washable except the wool hats, which are hand wash only.

Skip anything with elastane if you can. It is the fibre that fails first under repeated heat. That covers sports bras, compression shorts and most swimwear, which is why a wrap beats a swimsuit anywhere the rules allow one.

If you are still choosing between sauna types before you worry about what to wear in one, start with our home sauna roundup and the saunas hub. And if you are using a sauna blanket rather than a cabin, the clothing question changes completely. You wear clothes inside a blanket, and we cover why in our sauna blanket guide.

FAQ

Do you wear clothes in a sauna?

It depends where the sauna is, and the answer differs by country more than most guides admit. In Finland, and in single-sex saunas across the Nordics and Germany, the norm is nude with a small towel to sit on. In the United States, almost every gym and public facility requires clothing: 24 Hour Fitness, for example, publishes a rule that members wear appropriate clothing and footwear throughout its facilities, and shower shoes and swimming suits in the pool area. In a mixed-sex spa, a swimsuit or a cotton wrap is the safe default. In your own sauna at home it is entirely your call. The only non-negotiable is a towel between you and the bench.

What should you not wear in a sauna?

Six things. A sauna suit or any vapour-impermeable garment, which is the genuinely dangerous one. Metal jewellery, because metal reaches the air temperature of the room and conducts heat into skin far faster than wood or cloth does. Street shoes or trainers, on hygiene grounds and because nobody wants your gym soles on a bench they sit on. The workout clothes you have just sweated through, which will smell and hold heat against you. Makeup, which mixes with heavy sweat and sits in open pores. Contact lenses, which dry out fast in a 150–195°F room. Everything else is preference.

What do ladies wear in a sauna?

In a US gym, a swimsuit or a cotton spa wrap with an adjustable closure. A wrap is easier to get on over damp skin than a swimsuit and covers more than a towel you have to hold shut. In a European or Nordic single-sex sauna, nude with a towel to sit on is normal and swimsuits are sometimes actively discouraged, since chlorine and detergent residues get driven out of synthetic fabric by the heat. Skip anything with underwire, heavy elastic or a sports bra you have just trained in; the heat is uncomfortable against compressed skin and the elastane in a sports bra is the first fibre to give up under repeated heat.

Can you wear a bra in the sauna?

You can, and plenty of people do, but a sports bra is the worst choice available. It is usually a polyester–elastane blend that holds sweat against your skin instead of letting it evaporate, it compresses the exact area you want airflow over, and elastane degrades faster than any other common fibre with repeated heat exposure. If you want coverage, a cotton wrap, a swimsuit top or a towel all do the job better. Nothing melts. Polyester's melting point is around 480°F, more than twice any sauna temperature, so the problem is comfort and fibre life, not fire.

What do you wear in a sauna at the gym?

A swimsuit, gym shorts and a dry T-shirt, or a cotton wrap, plus a towel to sit on and a second one to dry off. Check your club's posted rules, because they vary and they are the rule that actually applies. 24 Hour Fitness publishes a requirement to shower before using the pool, whirlpool, sauna or steam room, requires appropriate clothing and footwear in its facilities, and permits shower shoes and swimming suits in the pool area. The consistent themes across US gyms are: clothing on, shower first, sit on your own towel, and no photography anywhere near the sauna or locker room.

Should you wear a sauna hat?

In a hot, dry sauna at 180°F and up, especially with steam thrown on the rocks, a wool felt hat is genuinely useful rather than a novelty. Your head sits in the hottest air in the room, since heat stratifies and the top bench is far hotter than the floor. Wool insulates, so it slows how fast that air heats your scalp and hair, which is why the hats are standard equipment in Russian banya culture and common in Finland. The two practical benefits are that you can sit comfortably for longer before your head tells you to leave, and that dry heat is hard on hair. In a 120–140°F infrared cabin it is unnecessary.

Is it better to wear a towel or a swimsuit in a sauna?

A towel, if the setting allows it. A swimsuit is usually polyester, nylon and elastane, which do not absorb sweat, so you sit in a wet synthetic layer for the whole session and it dries slowly afterwards. Cotton absorbs, breathes and washes hot. The one advantage a swimsuit has is that it stays put. A towel needs re-tucking, which is why an adjustable wrap with a snap or button closure is the better version of the same idea. If your facility requires a swimsuit, wear one; it is a comfort question, not a safety one.

Is it safe to wear a sauna suit in a sauna?

No, and this is the one item on the list with a body count behind it. A sauna suit is deliberately vapour-impermeable, which blocks the evaporation your body relies on to shed heat. In February 1998 the CDC's Morbidity and Mortality Weekly Report documented the deaths of three previously healthy collegiate wrestlers between 7 November and 9 December 1997; all three were cutting weight and all three, in the report's words, "used vapor-impermeable suits and exercised vigorously in hot environments". One died with a rectal temperature of 108°F. The NCAA responded by banning hot rooms above 79°F, saunas, steam rooms and vapour-impermeable suits outright for weight-cutting. Sauna suits are sold for exercise; adding one to a sauna removes your only cooling mechanism.

Do you have to be naked in a sauna?

Not in the United States, where you almost never can be outside a private facility. In Finland the norm is nude, but even there the rule that is enforced socially is the towel under you, not the absence of clothing. You can wrap a towel around yourself and nobody will comment. Mixed public saunas in Helsinki generally allow a swimsuit or a towel wrap. The thing to know if you travel is that in same-sex pool saunas across the Nordics, swimsuits are often discouraged or barred on the grounds that residues in the fabric come out in the heat.

Our Verdict

Two Turkish cotton towels and, if your sauna runs hot, a wool hat. That is the whole kit, and it comes to under $70.

If we were starting again with nothing, we would buy two WETCAT peshtemals at around $24 each, one for the bench and one to dry off, then add the ASKOLD two-pack of wool hats at around $18, because our barrel sauna runs at the temperature where a hat stops being a curiosity. Everything else on this page solves a problem that only exists in a public facility: the wraps solve coverage, the slides solve locker-room floors, the robes solve the walk back from the cold plunge.

What would we not buy at any price? A sauna suit. The CDC report from 1998 is nearly thirty years old and still the clearest thing ever written about why: the suit works by removing the one mechanism your body has for shedding heat, and in a room built to make you hot, that is not a shortcut.

More on how long to stay in once you are dressed for it in our sauna duration guide, and more about who we are and what we actually own on our about page.