Key Features:Downhill certified ASTM polymer shell in three sizesGreat ventilation360° Turbine TechnologyReduced peak brain acceleration by up to 30% at impact speeds associated with concussionReduces peak brain rotational acceleration by up to 40%breakaway visor function for additional rotational impact force reductionDouble D ring chin strapImpact foam for superior energy absorptionWashable inner linerOptimal neck brace compatibilityCertified and tested: AS/NZS 2063:2008, ASTM F1952–10, EN1078, CPSC 1203Weight: From 960 ± 50g (2.12 lbs)