Renowned for its ventilation and comfort, this all-purpose MTB helmet is fitted with 360 Turbine technology, offering great protection at a fair price.This fully ASTM DH certified helmet is the go-to helmet for enduro and bikepark riders.Uphill, downhill, upside down, E-bike or trail - you name it, the Gravity 4,0 has you covered.The full-face design with removable mouthpiece offers outstanding ventilation and its convenient Fidlock buckle makes life just peachy! We all crash.Sometimes hard, and sometimes even harder! There is a solution to minimize the risk of a head and brain injury, however - go and get the best helmet you can find that reduces both rotation and impact energy to your head and brain! Our helmets feature 360 ̊ Turbine Technology, the helmet is lined with turbines which are.360 ̊moving discs constructed from an energy-absorbing shape and material, this tech has two exclusive advantages, namely the reduction of rotational acceleration to the head and brain and the absorption of energy upon impact at concussion level.MAIN FEATURES.- DH certified lightweight Polymer shell in two sizes.- Maximized ventilation with 22 vents.- Removable mouthpiece ventilation cover.- 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%.- Dri-Lex moisture wicking, breathable, anti-odor and washable inner liner.- Optimal neck brace compatibility.- Visor with breakaway function for rotational reduction in a crash.- In-molded EPS + EPO impact foam for superior energy absorption.- Weight:From 850g (1,87 lbs).- Certified and tested:AS-NZS 2063:2008, ASTM F1952-10, EN1078, CPSC1203, - Sizing:S-55-56cm, M-57-58cm, L-59-60cm, XL-61-62cm.