●Built for both comfort and impact resistance with REINFORCED ABS SHELL & THICKENED SHOCK-ABSORBING EPS CORE. ●Skateboard helmet with removable/washable liner ●Smooth Fixed Venlitation System help heat circulation ●Well-attached & long-lasting adjustment dial and skin-friendly adjustable chin strap maxmize the best fit and comfortable wearing. ●ASTM F-1492 Skate safety standards, Recommended Age 18 or older