Whether you find yourself cutting through cold air on a frozen CX track, a morning commute, or cresting a double digit pass, the easily packable Pearl Izumi Barrier Headband packs plenty of warmth for its small profile. It fits snugly over ears and under helmet straps for a clean, aero profile, and keeps you warm and dry. The Barrier Headband uses Pearl's P. R. O. Thermal fabric, an insulating and moisture wicking material, that works best when its soft liner lightly touches the skin. At the front, a Barrier windproof panel blocks wind from the ears and forehead. This combination of wind protection, insulation, and perspiration management keeps your head dry and warm. Pearl Izumi also shaped the Barrier Headband for ponytail clearance, and gave it reflective elements for low light safety. It comes in Black and White and it's plenty stretchy to fit most head circumferences.