Polytree Motorcycle Biker Cycling Windproof Skull Cap Outdoor Rag Head Wraps Breathable and Quick dry polyester materials. Keep your head from sun,dust,wind, keep you warm in winter and cool dry in summer. Sweat absorb, moiture management material,keep your head dry. Comfortable to wear under hats, helmets or alone. Perfect for cycling,hiking,running,motorcycling,biking,football,and ther outdoor sports.