The sauna hat is one of the least discussed accessories in wellness — and one of the most functional. Its purpose is specific: to insulate the head from the direct heat of the sauna air, allowing the session to run longer and work more fully. The full material science behind wool is explored in the wool insulation guide.

The head is the most heat-sensitive part of the body. In a sauna where ambient temperature reaches 80 to 100 degrees Celsius, the scalp receives more direct heat than the rest of the body — which sits on the bench, at a lower level, away from the ceiling where heat concentrates. Without a hat, the head reaches its limit before the body has finished its work. With one, the session extends naturally.

Wool felt is well suited to the sauna hat. It insulates against heat, wicks moisture from the scalp as the body perspires, and holds its structure through repeated steam exposure. These three properties are not separable — the sauna calls for all three simultaneously, and wool is the natural fibre that tends to provide them together.

Hair benefits directly. Finnish-style löyly — ladling water onto hot stones — produces sharp, repeated bursts of steam. Over multiple sessions, this intensity can strip moisture from the hair. A wool felt brim intercepts that steam before it reaches the hair. The scalp stays protected without being cut off from the warmth below.

The saunamyssy — the Finnish sauna hat — has been part of the ritual for generations. Not as custom, but as answer: the head needed protecting, wool felt protected it, and the shape that achieved this most effectively became the tradition. The PP sauna hat follows the same reasoning: 100% natural wool felt, wide brim, loop handle for hanging between sessions, tonal PP monogram. Nine colourways. One material. The form has not changed because it still works.

The nine colourways guide covers colour choice and what makes the sauna hat a considered gift.