The Buff Reversible Polar is a 2 layer garment made from a seamless tube of polyester microfiber sewn top and bottom to a tube of fleece. this creates an air cushion, providing extra protection and helping to maintain body temperature in the cold weather conditions and it can be worn in a wide variety of ways. Great for keeping the neck warm in cold weather and much more practical than a traditional scarf. Wear it up round the face when its really chilly or just tucked into the collar of your jacket. Hikers and bikers love them.