. Made of Polyester Spandex fabric, breathable and quick-drying. This unique hat helps absorb and retain body heat, while wicking away moisture and reducing sweat build-up. Your helmet liner will be cleaner than ever before 2. Works amazingly as a helmet liner if you\'re mountain biking, road racing, motorcycling, skiing, snowboarding, and working outside 3. Holds your hair in place, a cure for messy hair, and keeps hair looking good after several hours in a helmet. In addition, the material stops sweat from dripping into your eyes on hot days.4. The lightweight, stretchy material makes this beanie snug but not too tight Name: Motorcycle Helmet Cap Gender: Mens Material: Polyester spandex Season: The year round Size: One size fit alls (for head circumference 54-64cm) Function: Breathable, quick-drying, moisture wicking