This snowboard helmet is to protect your head from unexpected injury during skiing.Durable PC shell with great impact resistance and high density EPS foam for great buffer action and shock absorption. Thick lining with detachable earmuffs ensures thermal insulation,suitable for winter outdoors acitivies. Features: Durable PC shell with impact resistance and high-density EPS foam for great shock absorption and buffer action. Detachable padded linings and warm thick earmuffs,provides warm in cold winter, and easily remove to wash. Earmuffs with snap buttons and elastic fastener straps,will not fall down easily during snow sports. Warm velvet lining with mesh net structure and 8 air vents effectively exhaust the moisture and keep cold air out. Rotatable dial and adjustable chin strap to easily adjust to the perfit size for your head. Goggle fixed strap behind the helmet to fix your goggle in place,which do not worry about loosing or falling down easily. Good conservation for motorcycling,skiing,and others snow sports. Specification: Size: M / L (optional) Color: Black / Pink / White / Blue (optional) Head circumference: M: 54-58cm (21.3-22.8") / L: 58-61cm (22.8-24.0") Material: EPS + PC + Velvet Air vents: 8 Weight: approx. 497.5 - 555.2 g / 1.1 - 1.2 lb Package List: 1* Helmet