SIZING CHART

O’NEAL Sierra II Helmet, featuring polycarbonate/ABS construction, is designed for more aggressive adventure riding and varying terrain. The Sierra II Helmet includes an integrated face shield and a shorter peak visor for more diverse functionality.

FEATURES:

– Polycarbonate/ABS Shell Construction
– Moisture-wicking, removable/washable air-channeled comfort liner
– Vent holes for optimal ventilation
– Integrated face shield
– Height-adjustable helmet shield
– Padded chin strap with micrometric safety lock
– Meets DOT and ECE 22.05 safety standards