In Finland, the sauna hat has a name: saunahattu. It's a simple felted wool hat worn in the hot room to keep the head, ears and hair more comfortable while the rest of the body takes the heat. Here's what the name means, how to compare wool hats, and how to wear one.
A sauna hat is optional, not a requirement of Finnish sauna bathing. This guide explains the accessory and how to choose one; it does not establish how widely hats are worn in Finland.
Quick answer
- What it is: a Finnish sauna hat (saunahattu) is a loose-fitting hat made of wool felt, worn in a traditional hot sauna.
- Why Finns wear one: heat rises, so the head sits in the hottest air in the room. Wool is a natural insulator that also breathes and handles moisture.
- A bell-shaped option: a soft bell or dome that covers the ears. Our Foldable Wool Sauna Hat ($20) has a packable bell-shaped silhouette.
- For a thicker feel: a thicker 5mm hat like the Viking or Captain ($35).
- The rest of the Finnish kit: something to sit on (our Wool Sauna Bench Pad) and a cotton towel (our Cotton Waffle Sauna Towel).
Finland, the country of saunas
To understand the hat, start with the sauna culture behind it.
Sauna is part of everyday life in Finland. You'll find saunas in homes, apartment buildings, summer cottages and offices. Finland's official site notes that the president and prime minister both have official saunas. UNESCO describes the sauna as traditionally "a sacred space – a 'church of nature'", where people "cleanse their bodies and minds."
At the center of it all is löyly, which UNESCO calls "the spirit or steam released by casting water onto a stack of heated stones." Every ladle of water on the stove sends a wave of hot, humid air up toward the ceiling, right where your head is. A hat is one optional comfort accessory; this description does not establish its historical origin.
What is a saunahattu?
The word is simple: sauna plus hattu (hat). It's usually a soft, felted wool hat with no lining and no hardware, shaped loosely enough to leave a pocket of air around the head. A Finnish sauna culture guide from Little Finland describes the sauna hat (saunahattu), or a hair towel (hiuspyyhe), as something that protects your head, neck and ears from the heat and helps keep hair from drying out.
A sauna hat adds a layer of material around the parts of the head it covers. Any comfort benefit varies by the wearer, fit and room conditions.
When choosing a sauna hat, compare its wool content and construction:
- Wool insulates. Felted wool traps air, so it slows how fast heat reaches your scalp.
- Moisture and care matter. Start dry and let the hat air-dry fully between uses.
- Check intended use. Follow each product's care instructions and the sauna manufacturer's guidance.
One honest note: a sauna hat is a comfort accessory, not protection against overheating. Listen to your body and keep sessions to what feels right. Our guide on how long to stay in a sauna covers timing.
A short history: from the smoke sauna to today
The oldest form of Finnish sauna is the savusauna, or smoke sauna. It has no chimney: smoke from the wood fire fills the room during heating and escapes through a small hole and the door. Little Finland calls it "the original and traditional sauna" and notes that about 25,000 smoke saunas are still in use in Finland.
Today most Finnish saunas are heated by wood-burning or electric stoves, called a kiuas, topped with stones. UNESCO lists electric, wood-heated, smoke and infrared saunas as all part of the culture, "with no hierarchy among them." This cultural recognition does not establish how widely hats are worn. Similar hats are worn in Russian banya and Baltic sauna traditions, too; see our banya hat vs sauna hat guide.
What to look for in a sauna hat
This is a buying checklist, not an official Finnish design standard.
| Trait | What to compare | Why it matters |
|---|---|---|
| Material | 100% wool felt | Insulates, breathes and handles moisture |
| Shape | Soft bell or dome; some with a brim | Leaves an air pocket around the head |
| Coverage | Down over the ears | Ears are among the first places to feel the heat |
| Fit | Loose, never tight | Comfort and airflow |
| Thickness | Listed thickness and construction | A preference, not a temperature or duration rating |
Finnish-style sauna hats from Halsa
Halsa is a Wisconsin-based brand, not a Finnish one. Halsa hats are made from wool; the Merino Wool Sauna Hat uses 100% Merino wool and the Felt Sauna Hat 2-Pack uses wool felt. Check each listing for its construction, fit, coverage and care instructions.
Foldable Wool Sauna Hat
$20 · 2mm
A packable bell-shaped wool sauna hat. It folds flat for a gym bag or cottage trip.
Shop the Foldable
Bucket Wool Sauna Hat
$20 · 2mm
Our most-ordered hat, with a brimmed wool design. Coverage depends on fit.
Shop the Bucket
Viking Wool Sauna Hat
$35 · 5mm
A listed 5mm wool construction in a horned design. Compare fit and feel; thickness is not a safe-use rating.
Shop the Viking
Captain Wool Sauna Hat
$35 · 5mm
5mm wool in a captain's cap shape. A thicker hat with a cleaner, less playful look than the Viking.
Shop the Captain
Merino Wool Sauna Hat
$30
100% Merino wool, with finer fibers that can feel softer against the skin.
Shop the Merino
Beanie Wool Sauna Hat
$30 · Grey or Brown
A rolled-cuff wool felt beanie for someone who prefers an everyday-headwear silhouette.
Shop the BeanieWant something with personality? Try the 5mm Floral ($35), the Mushroom ($25), the Checkered or Green Checkered ($20), or two hats in the Felt Sauna Hat 2-Pack ($20). See every sauna hat.
The rest of the Finnish sauna kit
In a Finnish sauna you sit on the lauteet (the wooden benches), and you bring a towel. These two pieces complete the hat.
Wool Sauna Bench Pad
The upper bench is where the best löyly is, and also where the wood gets hottest. Many saunas use a small seat cover or towel for comfort and hygiene. Ours is made from the same wool felt as our hats, so you're sitting on wool instead of hot cedar.
- 100% wool felt, 10mm thick
- 13.5" × 13.5" personal seat, fits any bench
- Your own clean seat in shared or public saunas
Cotton Waffle Sauna Towel
Finnish sauna is done in rounds: heat, cool down outside or in a cold shower or lake, then back in. A cotton waffle towel is light enough to dry between rounds and big enough to wrap up in on the porch.
- 100% cotton waffle weave, 380 GSM
- 80 × 145 cm (about 31.5 × 57 in)
- Hang loop for drying between rounds
- Pre-order now, ships mid October 2026
How to use a sauna hat the Finnish way
- Shower first. A Finnish sauna begins with a wash, usually a shower, before you enter the hot room.
- Put on your hat before you go in. Check that the shape gives you the coverage you want. It should sit loose, not snug. Start with a dry hat and follow its care instructions. Do not wring the wool; air-dry it fully between uses.
- Lay down your seat. Place your bench pad or towel on the lauteet before you sit.
- Ask before you throw löyly. If others are in the sauna, it's polite to ask before you throw water on the stones.
- Cool down between rounds. Step out, cool off, rest and rehydrate. According to finland.fi, most people in Finland have at least two sessions in the hot room.
- Hang your hat to dry. Let it air dry between sessions. See our wool sauna hat care guide.
New to it? Our beginner's guide to wearing a sauna hat and the perfect sauna ritual go deeper.
A Finnish sauna glossary
| Sauna | The heated room itself. One of the few Finnish words used around the world. |
| Saunahattu | Sauna hat, traditionally made of felted wool. |
| Hiuspyyhe | Hair towel, an alternative to a hat for covering the head and hair. |
| Löyly | The steam that rises when water hits the hot stones, and the heat of the sauna in general. |
| Kiuas | The sauna stove, wood-burning or electric, topped with stones (kiuaskivet). |
| Lauteet | The wooden benches you sit on. The higher the bench, the hotter the air. |
| Vihta / vasta | A bundle of leafy birch branches used to gently whisk the skin. The name depends on the region of Finland. |
| Savusauna | Smoke sauna, the original chimney-less Finnish sauna. |
Frequently asked questions
What is a Finnish sauna hat called?
In Finnish, a sauna hat is called a saunahattu, from sauna plus hattu (hat). It's traditionally made of felted wool.
Why do Finns wear hats in the sauna?
Heat rises, so the head sits in the hottest air in the sauna, especially after water is thrown on the stones. A loose wool hat helps keep the head, ears and hair more comfortable so you can enjoy the heat. It's a comfort accessory, not protection against overheating.
What is a traditional Finnish sauna hat made of?
Read the individual specification. Halsa hats are made from wool; the Merino Wool Sauna Hat uses 100% Merino wool and the Felt Sauna Hat 2-Pack uses wool felt. Wool is a fiber, while felt describes construction.
What is the most traditional sauna hat shape?
Bell and dome shapes are options, but this guide does not establish a single Finnish national standard. Check coverage and fit. The Halsa Foldable Wool Sauna Hat ($20) has a bell-shaped silhouette.
Do I need a thick sauna hat for a Finnish sauna?
No universal thickness prescription is established here. Compare the listed 2mm Bucket or Foldable with a 5mm style such as the Viking or Captain by fit and feel. Thickness does not establish a safe temperature or session duration. See our sauna hat thickness guide.
What else do you need for a Finnish sauna?
A towel and something to sit on. A cotton waffle sauna towel dries between rounds, and a wool bench pad gives you a comfortable seat on hot wooden benches.
Is a Finnish sauna hat the same as a banya hat?
They're close cousins. Both are felted wool hats worn in a hot, steamy room. Banya hats from the Russian tradition are often taller or more decorative. Read our banya hat vs sauna hat guide.
Keep reading
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