SB-120S4 Imitate in-mold bicycle helmet for adult 20 air vent cooling system Rear vents to help channel air front to back ACU LOC rear retention system keeps the helmet snug and fit Black EPS impact absorption liner Durable, high gloss PVC shell Cute and colorful silk-screened shell Quick release micro buckle Size: S/M/L (56-59-62cm) America CPSC, CE EN1078 tested and certified