JBM Skateboard Helmet CPSC ASTM Certified Impact Resistance Ventilation for Multi-Sports Cycling Skateboarding Scooter Roller Skate Inline Skating Rollerblading Longboard IMPACT RESISTANCE The skateboard helmet adopts durable tough shell with soft liner which could absorb external pressure caused by crash in skating activities. Wearing the scooter helmet, will feel much safer and more confident, and thus perform better in sports activities. VENTILATION As designed with multiple vents, special aerodynamic design and breathable foam, the skate helmets help reduce sweating and keep men and women feel cool even during intense body movement, which is considered as cool helmets for skateboarding or roller skate. ADJUSTABLE STRAPS FOR BETTER FIT The skateboarding helmets equipped with adjustable straps for adult to adjust flexibly to get a better fit. As adopt lightweight material with excellent quality, this skating helmet won't cause additional pressure to head. Adult wear the longboard helmets safe and comfortable. MULTI SPORTS GEAR As ideal skateboard accessories, the cool helmets are widely used in skating activities such as skateboarding, roller skating, inline skate, scooter, rollerblading, longboard and two wheel electronic board. As play great protective function during these activities, the skateboard helmets are considered as the best helmets for skating activities. PACKAGE Helmet X1; Small: 18.1-19.3, Medium: 19.7-21.7'', Large: 20.9-23.2''.