Crafted for
calm within.

Rozika is our grandmother. She has been working with wool her whole life, in a small family workshop that has been running for decades. When we needed a sauna hat we actually liked, we asked her. She showed us how to cut the felt, how to read the material, how to finish the edge by hand. That afternoon turned into CosyRosy. The name is split between us: Cosy for the warmth and the ritual, Rosy for her. Every hat is shaped by her hands.

Yes. A wool sauna hat changes how you use the sauna in ways that are hard to overstate once you have felt them.

It lets you stay in significantly longer. Your scalp overheats faster than the rest of your body. The hat slows that down, extending comfortable session time by 15 to 30 minutes for most people. It also protects your hair and scalp from direct heat damage, repeated high heat dries out follicles and can cause breakage, and the felt acts as a breathable barrier.

There is a physiological reason too. Keeping the head cooler while the body heats allows for a more controlled circulation response, which is part of what makes the sauna beneficial in the first place. And there is a simpler reason: putting the hat on is a gesture. It signals the beginning of something intentional. It makes the practice feel like a ritual rather than just sitting in a hot room. Sessions that are too intense are sessions you dread. The hat makes deep, regular sauna practice something you can maintain for years.

Natural wool felt. It breathes, it insulates, it handles moisture without soaking through like cotton. Synthetic options feel fine at first but degrade faster in repeated high heat. Wool was the material used for centuries before performance fabrics existed. There is a reason for that.

All of them. The hat works wherever heat is the point.

In a traditional Finnish sauna, high dry heat and löyly steam are the original context the hat was made for. It insulates your scalp and lets you stay in longer without discomfort. In an infrared sauna, the body is heated directly rather than through the air, and a wool hat reduces the radiant heat reaching your head in the same way. In a steam room or hammam, humidity changes how heat is perceived but the scalp still absorbs it. Wool handles moisture well and will not become heavy or waterlogged in a short session.

Wood-fired barrel saunas, common in Scandinavian outdoor setups, have a heat profile close to Finnish and the hat performs identically. Smoke saunas, the oldest type, run at lower temperatures with long slow sessions. The hat is not strictly necessary there but many people use one out of habit and ritual. If in doubt: if it gets hot enough that you think about your head, the hat belongs there.

Our hats are made from natural wool, which is naturally antibacterial. Lanolin, the wax found in wool fibres, inhibits bacterial growth and resists odour on its own. This means you do not need to wash it after every session. Air it out between uses and it will stay fresh.

When you do wash it, handle it carefully. Wool felt can shrink or distort with rough treatment. Cold water only. A gentle wool detergent, used sparingly. By hand is safest; if you use a machine, choose the most delicate cycle available at 30 degrees or below. Do not wring or twist. Never tumble dry. Press out the water gently, reshape the hat while it is still damp, and lay it flat on a towel until fully dry. The felt may soften slightly with washing. That is normal, and over time the hat will shape itself to you.

Years. Possibly a decade or more with good care. Wool felt actually gets better with use as the fibres compress and interlock. Unlike synthetic materials that break down in repeated heat, natural wool does not degrade. This is an object made to last.

Our hats are made with a generous, forgiving fit that suits most adult head sizes. The wool felt has natural give and shapes itself to your head over the first few uses. If you have a particularly large or small head, write to us before ordering and we will advise.

Not yet. We are launching on Kickstarter. Sign up to the waitlist and you will be the first to know when the campaign goes live. Early backers get priority access and the best pricing we will ever offer.

In a small family workshop in Europe, by hand. The wool is locally sourced from free-range highland flocks. Every hat is cut, shaped, and finished by Rozika, our grandmother and the person who taught us the craft. No factories, no outsourcing.