• Two reinforced layers: strong ABS shell resists impact and high quality EPS foam provides shock-absorbing. Complies with U.S. Consumer Product Safety Commission Safety Standard for Bicycle Helmets for Persons Age 5 and Older
• 3 Sizes. Medium is for adult and youth. Please choose the helmet size according to the head circumference
• Suitable for various outdoor sports such as biking, skateboarding, skating, scooter, longboard, hoverboard and so on
• 11 vents provide sufficient air flow, reduce sweating, keep user cool and comfortable
• Fully adjustable for a custom fit, provided by the crank adjustment dial, 2 sets of pads with different thickness, and length-adjustable chin straps