KUYOU Kid's Skateboarding Helmet,Ultimate Adjustable ABS Shell for Children Cycling /Skateboard/Scooter/ Skate Inline Skating /Rollerblading Protective Gear Suitable Boys/Girls.(S Blue) KuYou Helmet is CE certified, EN1078 Certified /CPSC Standards (This is the current european safety/manufacturing standard for helmets. The toughest testing requirements for helmets are currently imposed by CE-tests, including impact damping capabilities, effectiveness of the strap system as well as range of vision.) Adjustable straps and spin dial (which is removable): The skateboarding helmets equipped with adjustable straps and and spin dial for Adult /kids to adjust flexibly to get a better fit. Fits Head circumference Size: S :45-51cm/ 17.7" - 20.1" ; M : 49-55cm / 19.3"-21.7" ;L:52-58cm / 20.5"-22.8",Please According to head circumference, choose your size. Impact resistance :The skateboard helmet adopts durable tough shell with soft liner which could absorb external pressure caused by crash in skating activities. kids/adult wear the skateboarding helmets will feel much safer and more confident, and thus perform better in sports activities. 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.