The Buff Micro Polar Hat boasts the wherewithal to tackle active, cold-weather sports, with a quickto-dry, moisture managing outer layer featuring Polygiene? odor control. The Micro Polar Hat is engineered to be protective, comfortable and perfectly fit, no matter the temperature. A fleece inner lining provides extra warmth.100% microfiber polyester outer layer. Fleece lined interior. Polygiene? odor control fabric. Cool weather thermal protection : 32?f - 68?f. Moisture-wicking, dries quickly. One size fits most adults.