Leatt - V25 Enduro 2.0 Helmet (MTB)REMOVABLE CHIN BAR HEAD AND BRAIN PROTECTIONMade from a lightweight polymer shell, the Enduro 2.0 helmet features 360 ̊ Turbine Technology. Premium safety at a great price! These small blue 360 ̊moving 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 micro adjuster at the back ensures the perfect fit. There is also a sunglasses docking port to stash your sunnies when you don’t need them. The visor is adjustable and has a breakaway function for extra rotational impact force reduction. The chin bar has an easy push button function which quickly detaches it from the top shell. No need to remove your gloves or take the helmet off. Easy and fast adaptability!Lightweight polymer shell in three sizesRemovable chin bar with easy push-button systemSunglasses dock port for easy, secure storageFidlock magnetic closure system360° Turbine TechnologyReduced peak brain acceleration by up to 30% at impact speeds associated with concussionReduces peak brain rotational acceleration by up to 40%Adjustable visor with breakaway function for rotational impact force reductionIn-molded impact foam for superior energy absorptionMaximized ventilation with 20 vents effective even at low speeds  Moisture wicking, breathable, anti-odor and washable inner linerCertified and tested: AS/NZS 2063:2008, EN1078, CPSC 1203Chin bar passes ASTM impact testingWeight: From 690g (1.52 lbs). Without chin bar: from 360g (0.79 lbs)  Sizing#S (51-55cm – 20-21 58") #M (55-59cm – 21 58- 23 14") #L (59-63cm – 23 14 - 24 34")