Generic Cycling Bicycle Adult Bike Safe Helmet Carbon Hat With Visor 19 Holes Blue Ultra-light Materials, Wear Light; Wind tunnel, Duct Design, Effectively Reduce Wind Resistance High-quality Foam Layer, the Adjustment Within the Twist Adjustable and Removable Visor and Visor Plugs Make this Bike Helmet Perfect Many Channeled Vents Bring Cool air in Through the Front