Skateboard Helmet, Hicool Protective Helmet for Bicycle Bike Cycling Skiing Skateboard Outdoor Sports Advanced Material: Made with ABS shell and EPS lining sponge fabric, lightweight(Only 380g) but very durable, delivers a strong IMPACT RESISTANCE, perfectly protect your head from BEING HURT Excellent- Vent Design: With 11 large vent openings apply to the helmet for good ventilation to keep your head cool during intense use. Interior padding can wick away sweat, stench, and bacteria, keeping you stay dry and irritation-free Ergonomics Design: Adjustable straps allows to personalize the fit to your head easily, quick release buckle,easy to take off and take on For Variety Use: Take this helmet on, you can enjoy yourself in many outdoor sports, such as skating, hip-hop, climbing cycling and other extreme sports US CPSC Safety Standard tested and approved. Size: S:52-55cm, L:55-59cm. We offer a 12-Month Warranty