Lightweight Polymer Compound shell in three sizes MaxiFlow impact foam air channels effective even at low speed 360° Turbine Technology Reduced peak brain acceleration by up to 30% at impact speeds associated with concussion Reduces peak brain rotational acceleration by up to 40% In-molded impact foam for great energy absorption Maximized ventilation with 20 vents Visor with breakaway function for rotational impact force reduction Dri-Lex® moisture wicking, breathable, anti-odor and washable inner liner Certified and tested: AS/NZS 2063:2008, EN1078, CPSC 1203 Weight: from 300g (0.65 lbs) Plastic Free Recyclable Packaging Sizing: S (51-55cm – 20-21 58''), M (55-59cm – 21 58 - 23 14''), L (59-63cm – 23 14 - 24 34'') 
