Suspension: Ratchet Available in various colours High-density polyethylene provides all-around limited impact and penetration protection. Universal slots will accept all attachments. Expanded polystyrene inner shell prevents injuries from lateral, side and back impacts. 6-point ratchet suspension system comes with 2 adjustment levels for headband. Rear tab sliding mechanism allows centering of helmet on head. Crown pad and sweatband for user comfort. Weighs less than 17.1 oz. Certified to CSA standard Z94.1-05 type 2 Class E.