Features Skateboard Helmet: Superior Safety Standards Our skateboard helmet is certified by both ASTM (American Society for Testing and Materials) & CPSC (U.S. Consumer Product Safety Commission), ensuring that you can enjoy your ride with peace of mind. The helmet is designed with reinforced ABS SHELL and shock-absorbing EPS inside layer to provide maximum safety and comfort. Customizable Comfort With an extra removable liner in different thicknesses, you can adjust the helmet fit and maintain better hygiene, making your riding experience more comfortable and personalized.  Cool & Comfortable Ride The professional ventilation system with 12 air vents will keep you cool and comfortable for hours of riding, allowing you to enjoy your skateboarding experience without worrying about discomfort. Versatile Design This all-purpose helmet is perfect for not only skateboarding, but also for cycling, BMXing, Inline skating, MTBing and more. With multiple color options available (blue, yellow, orange, pink, red, mint...), you can choose a helmet that matches your style and stands out from the crowd. HOW TO FIND OUT YOUR PERFECT HELMET SIZE? To figure out the correct helmet size, wrap a measuring tape around your head, keep the tape 1 inch above your ears, and level front to back (In most cases, you are now measuring the widest part of your head).