The perfect lightweight helmet offering great head coverage for ultimate protection. This is a lot of helmet for the price. It offers extensive protection around the head and a deeper rear coverage. It also includes Leatt’s 360 Turbine technology which is proven to reduce the risk of concussion by up to 30% and rotation forces upon impact by 40%. With 14 vents and Maxiflow air channels the lightweight construction also offers great ventilation for those hot days. 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% Extended rear coverage for added protection Adjustable visor with breakaway function for rotational impact force reduction In-molded impact foam for great energy absorption Maximized ventilation with 14 vents effective even at low speeds Moisture wicking breathable and washable inner liner Certified and tested: AS/NZS 2063:2008 EN1078 CPSC 1203 3-year Leatt Helmet Replacement Program. Click here to know more Weight: from 320g 070 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"