Bontrager Thermal Cycling Headband is designed to fit confrotably under your helmet & protect your ears from the elements, a must have for any winter cyclist. Made from soft thermal fabric to provide just the right amount of warmth & moisture wicking Features Thermal fabric traps body heat & wicks moisture, keeping you warm & dry The fabric is breathable, moisture-wicking & fast-drying The ergonomic shape keeps ears warm while riding Low-profile design allows for comfortable fit under helmets Ponytail port adds long-hair versatility