CE approved ,A sleek, Aerodynamic design, much air vents for ... helmet,sport bike helmet,bike helmet1)Vent:19vents 2)A sleek, Aerodynamic design, much air vents for maximum ... cooling 3)Adjustable chin straps for added comfort 4)A quick-release strap buckle. 5)It offers protection ... whilst being comfortable to wear. 6)A variety of sizes and colors are available 7)Customized ...