S-One Lifer Helmet

The S-One Lifer helmet is tested to meet both CPSC (single impact) and ASTM (multi impact) standards for helmets, with high impact EPS fusion inner foam mold. Designed to fit low on the head with lightweight construction and a wide range of sizes to help you find a good fit. See also the S-One Kid helmet for smaller sizes.

Small: 21"

Medium: 21.5"

Large: 22"

XLarge: 22.5"

XX Large: 23"

XXX Large: 23.5"