The air in the banya may be up to 70 degrees Celsius, but a felt hat will keep the air around your head at a comfortable temperature.
So the felt hat comes to the recue! It keeps the head dry and cool, and – this is for the ladies – it prevents your hair being damaged by heat.
Why felt? Felt is a great insulator – it keeps the air inside of it in a constant temperature. Most often a felt hat serves us to protect from the cold but it can protect from the heat in the same way.