Introduced in 2010, Reversible Polar Buff is a continuous double layer of polyester microfibre & Polartec fleece. Wear it with the fleece inside or out or half way up or halfway down, or not quite halfway or with the microfibre inside, or out or..... The possibilities are almost endless, rather like the product! Polar Buff Reversible is a 2-layer garment & from a seamless tube of polyester microfibre sewn top & bottom to a tube of Polartec fleece. This creates an air cushion, providing extra protection & helping to maintain body temperature. It can be worn in a wide variety of ways.USESPolar Buff Reversible can be worn as a neckerchief, mask, balaclava, scarf or sahariane with either side on the outside or just part way.