
Climb to the top bench with a felt hat on. Thick wool shades your head from the hottest air under the ceiling.

Water on the stones, a few drops of scent, and the gusmester waves a towel to move the steam around the room.

Hat on the hook, down the jetty and into the harbor. A poncho and slippers for the walk back.
Felt is wool pressed and worked until the fibres lock together. It is thick enough to hold its shape and soft enough to fold, it shades without trapping, and it dries on a hook between rounds. Cotton gets heavy and stays wet.
Felt is thicker and holds its shape on the top bench. Knit is lighter, softer and easier to pack, and good for a long session or a cold walk.
Rinse it in cold water after the session, squeeze it gently, reshape the brim and dry it on a hook. No machine, no tumble dryer.
Measure around your head just above the ears. S/M fits up to 57 cm and L/XL up to 61 cm; the one-size hats fit up to 59 cm.
Yes, though wool soaks up steam and gets heavy. Felt is made for dry heat; a knit beanie copes better with steam.