Helmets.MTB helmets.All-day comfort with superior head and brain protection.The AllMtn 3.0 helmet is also features 360º Turbine Technology.These small blue 360ºmoving discs are 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. The helmet features low speed ventilation ports and a Fidlock® magnetic buckle for easy fitting.You can conveniently store your sunglasses at the rear of the helmet as well.The visor is adjustable and breaks away upon impact for extra rotational impact force reduction. If you are looking for a multifunctional, lightweight helmet, then the 3.0 All MTN helmet is the helmet you want. MAIN FEATURES. -PowerBridge in-molded force absorber. -Lightweight polymer shell in three sizes. -Sunglasses dock port for easy, secure storage. -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%. -Adjustable visor with breakaway function for rotational impact force reduction. -In-molded impact foam for superior energy absorption. -Maximized ventilation with 20 vents effective even at low speeds. -Moisture wicking, breathable, anti-odor and washable inner liner. -Certified and tested:AS/NZS 2063:2008, EN1078, CPSC 1203. -Weight:from 350g (0.78 lbs). -Sizing:S (51-55cm - 20-21 58´´), M (55-59cm - 21 58- 23 14´´), L (59-63cm - 23 14 - 24 34´´).