Most questions about what to wear are primarily aesthetic. The sauna is different. What is against the skin during a session has a direct effect on the session itself — on how long it can run and how fully the body responds to the sustained heat.

The practical answer has two parts, because the body and the head have different requirements in the sauna.

For the body: something lightweight and natural, worn loosely. A cotton or linen wrap or towel. The reason is simple — these fibres move moisture away from the skin as the body releases it. They do not hold heat at the surface or create friction against the skin. Worn loosely, they allow the session to proceed without the fabric working against it.

For the head: a wool felt hat. The head is at ceiling height — where temperature is highest — and requires insulation, not just breathability. A lightweight cotton wrap does not insulate enough to make a difference at 90 to 100 degrees. Wool felt does. It reduces the direct heat at the scalp, which is what allows the rest of the session to extend. The full explanation of why wool insulates as it does is in the material science guide.

These are different requirements, which is why the answers are different materials. The body needs to breathe. The head needs to be shielded.

The PP sauna hat — natural wool felt, wide brim, nine colourways — is designed for the head’s requirement. It can be hung between sessions on the loop handle at the crown, which keeps it dry and ready rather than left on the bench to absorb ambient moisture.

Most people who try a sauna with a wool hat for the first time stay longer than they expected to. The head stays comfortable. The session opens up. That is the point of it.

The sauna hat benefits guide explains in detail what the hat does and why the Finnish tradition that produced the form is still the right answer.