Mountain Bike Bicycle Eextreme Sport Riding Breathable 22 Vents Helmet Safety HatKey Features...Absorbent EPS + PC material, impact resistance, provide comprehensive protection.The ventilation openings, much breathable and ensures you the comfortable wearing.The lining with high-density EPS, super absorbent sweat, and great shockproof.Adjustable sun visor with a quick release system, allows you to..