HELMET SMALL, MENS. Delivering classic Pro-Tec styling and multi-impact protection, the B2 Snow is perfect for getting that trick dialed in at the park. Sizing:S/M 20.9" - 22" 53-56cm L/XL 22.4" - 23.6" 57-60cm Hard ShellHardshell construction utilizes a durable, high-density, injection- molded ABS shell, ideal for an aggressive riding style. Wind ShieldExclusive to Pro-tec, this patent pending technology allows your goggles to rest inside a channel on the helmet interior, blocking cold air and sealing the unsightly gap between your goggles and helmet. Multi-Impact SXPPatented multi-impact material that is ideal for an aggressive riding styleBuilt-in rebound control