The Reversible Polar Buff® can be worn as a neckerchief, headband, face mask, balaclava, or scarf. On one side is Buff's special microfiber, and on the other side is a cylindrical piece of Polartec® ultra-thin fleece that will maintain body temperature, and prevent heat loss. Polygiene® technology, based on natural silver salts and recycled silver, is incorporated into the fabric, not just the individual fibers or panels to protect against odor. In graphite. One size. Imported.