O'Neal Sierra Helmet Rely on style, safety, comfort and innovative technology - the SIERRA Helmet from O'NEAL combines everything in a strong overall package. Concentrate fully on the track on the bike and rely on a helmet that supports you all around. EST. 1970 - DESIGNED IN CALIFORNIA Features Polycarbonate/ABS Shell construction Weight: 1590g (¤ 50g) Moisture wicking, removable/washable air channeled comfort liner Vent holes for optimal ventilation Integrated face shield Height adjustable helmet shield Padded Chin Strap with Microlock Meets DOT and ECE 22.06 safety standards Designed for Street, Enduro, Side by Side and Adventure Bikes