About this item Classic skate helmet with ABS outer shell and stink-free, moisture-wicking Sweatsaver liner; designed for skateboarding and roller skating. Sweatsaver liner is easily-removable for cleaning; adjustable chin strap Sweatsaver pads fit very snug when they are brand new, and will break in for the optimal fit; expect to wear for a couple of hours before the helmet is completely broken in Available in five sizes: S fits 20.6–21.3 in (52–54 cm), M fits 21.4–22 in (54–56 cm), L fits 22.1–22.9 in (56–58 cm), XL fits 23–24 in (58–61 cm), XXL fits 24-25 in (60–62 cm) To determine proper size, measure with a soft tape measure or string; manufacturer’s 180-day limited warranty This product is NON-CERTIFIED and is NOT intended for use as a bicycle helmet. This product has NOT been tested under CPSC, ASTM, or CE safety standards.