Don't know the sauna hat? What good is a sauna hat? In Finland, Lithuania, Latvia, Estonia and Russia, the sauna hat should not be missing when visiting the sauna. As you protect your head from heat and cold in summer and winter, you protect the sensitive head from heat during the sauna. You have the following advantages with the sauna hat: protects the head from overheating during the sauna. - Protects the head from cooling after injection. - Protects hair from damage caused by extreme heat. One size fits all. The size of the sauna hat is 60 to 65 cm (head circumference). Material: felt. Cotton absorbs water and heats even more. Make sure that the sauna hat is not made of cotton or polyester. Polyester can diffuse toxic gases in heat. Please note that felt is a natural product and must be treated carefully. Please do not machine wash or break it on the product. The hat is suitable for men, women and children.