* Polymer Compound shell in three sizes* Adjustable visor* Fidlock magnetic closure system* 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%* Maximized ventilation with 18 vents effective even at low speeds* Dri-Lex moisture wicking, breathable, anti-odor and washable inner liner* In-molded impact foam for superior energy absorption* Breakaway visor function for efficient impact force reduction* Certified and tested: AS/NZS 2063:2008, EN1078, CPSC 1203* Weight: from 360g (0.79 lbs)* Sizing: S (51-55cm 20-21 5/8″), M (55-59cm 21 5/8-23 1/4″), L (59-63cm 23 1/4-24 3/4″)