When you're outdoors in cold weather, it's just as important to keep your head warm as it is to keep the rest of your body warm. It's true what they say about the head acting like a chimney where heat escapes even if you are otherwise correctly dressed. Headband 200 is made of a double layer of our own fabric UllfrottA Original 200. While it keeps you warm, the wool's unique characteristics also let excess heat out. The headband is made of double layers of 200 terryknit.This creates great loft which insulates the body heat, at the same time the loose knit does not block excessive heat if you are working hard. Specifications Merino wool 60% Polyester 25% Polyamide 15%