Renowned for its ventilation and comfort, Leatt MTB Gravity 4.0 V23 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! 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! Leatt's helmets feature 360 Turbine Technology, 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. So, the next time you crash, see to it that you are protected by the best helmet! 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 Real weight (M): 865 g Certified and tested: AS/NZS 2063:2008, ASTM F195210, EN1078, CPSC1203. Size Chart: S = 55-56cm M = 57-58cm L = 59-60xm XL = 61-62xm 2XL = 63-64cm