Helmets.MTB helmets.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. MAIN FEATURES. -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. -Weight:from 320g (0,70 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´´).