What to wear in a sauna depends on where you are. In a private home sauna, most people wear a towel or nothing at all. In a gym or spa, a towel or a simple swimsuit is the norm. In Finland, the Finnish Sauna Society does not allow swimsuits in its saunas at all, for hygiene reasons.
This guide covers each setting, the fabrics that handle heat well, and what to leave outside. It also gives you a short checklist you can print or share.
Quick answer: what to wear in a sauna
| Setting | Usual choice | Notes |
|---|---|---|
| Home sauna, alone or with family | Towel, wrap or nothing | Sit on a bench towel either way. |
| Gym or spa sauna | Towel or plain swimsuit | Follow the posted house rules. |
| Traditional Finnish public sauna | Nothing, seat cover only | The Finnish Sauna Society bans swimsuits inside its saunas. |
| Infrared cabin | Bare skin or light towel | Harvia notes that a towel partly blocks infrared heat. |
Home sauna: comfort comes first
At home, you set the rules. Most owners wear a cotton or linen towel wrapped at the waist, or nothing. Because nobody else uses the room, the main concern is the wood. Harvia, the Finnish heater maker, advises that you wash before entering and always sit on a bench towel. That keeps sweat off the cedar and keeps the benches looking new.
Also, a towel under you matters more than what you wear. Cedar is soft and takes stains easily. For care tips, see our guide to keeping a cedar sauna looking new.
Gym, spa and hotel saunas
Shared saunas in the US usually expect a towel or a swimsuit. Still, every facility has its own policy, so read the sign at the door. A few habits make you a good neighbor:
- Shower before you go in.
- Sit on your own towel, with your whole body on it.
- Choose a plain swimsuit without metal clasps or zippers.
- Skip gym clothes you trained in, because they carry sweat and odor.
The Finnish rule: no swimsuits
In Finland, nudity is the custom in single-gender saunas. The Finnish Sauna Society in Helsinki states that swimsuits are not allowed in its saunas for hygiene reasons. Bathers take a seat cover from the front desk instead. However, the Society does allow a wrapped towel for guests who cannot be naked for religious reasons.
The reasoning is practical. Swimsuits may hold pool chemicals and trap heat against the skin. So if you visit a traditional sauna abroad, bring a towel and a seat cover rather than swimwear.
Best fabrics for sauna heat
Natural fibers handle heat and moisture best. Cotton, linen and terry cloth absorb sweat and stay comfortable on hot wood. Many regular bathers also like a sauna kilt or a wrap with a snap closure.
In contrast, synthetic fabrics such as polyester and nylon trap heat and can feel sticky. Avoid anything with metal parts, since metal gets hot fast. For the same reason, a wool or felt sauna hat is popular in Finland. It keeps the head cooler while the body warms up.
What to leave outside the sauna
- Jewelry and watches. Metal heats up quickly and can become uncomfortable on skin.
- Phones and electronics. Most devices are not rated for sauna heat or steam.
- Contact lenses. Many facilities ask bathers to remove them, since the hot, dry air can irritate eyes.
- Glasses. Metal frames get hot, and lenses fog up with steam.
- Shoes. Go barefoot inside, and use sandals for the walk there.
- Makeup and lotion. They block sweat and can stain the benches.
Your sauna checklist
- One towel to wear, or none at home.
- One bench towel to sit on.
- A bottle of water for after the session.
- Sandals and a robe for the walk to an outdoor sauna.
- Optional: a felt sauna hat.
If your sauna stands in the backyard, the robe and sandals matter most in winter. That is also the time when most people use it. For timing and rounds, read how long to stay in a sauna, and for heat settings, see how hot a sauna should be.
FAQ: what to wear in a sauna
Can you wear clothes in a sauna?
You can, as long as they are loose and made of natural fiber. However, regular clothes soak through quickly and hold heat against the skin. For that reason, most bathers prefer a towel or wrap instead.
Should you wear a swimsuit in a home sauna?
It is your choice. Still, many owners find a towel more comfortable, since a swimsuit stays wet and warm. If you do wear one, pick a plain style without metal parts.
Is it okay to be naked in a sauna?
In a private sauna, yes, and it is the norm in Finland. In shared US saunas, on the other hand, a towel or swimsuit is usually expected. So check the house rules first.
What should you sit on in a sauna?
Always sit on a towel or seat cover. In fact, both Harvia and the Finnish Sauna Society treat this as a basic rule, because it protects the wood and keeps the bench hygienic.
Can you wear socks in a sauna?
Thin cotton socks are fine in a private sauna if your feet get cold on the floor. Even so, most people go barefoot and keep the floor clean instead.
Planning a sauna at home?
With a private sauna, you decide the dress code. Our outdoor saunas are handcrafted in Ontario from Eastern White Cedar, from the Canadian Timber barrel sauna at $5,976.50 to the Granby, Palmer and Georgian cabins. Each ships with free curbside freight in the lower 48. Questions about size or heater? Contact us and we will help you plan it.