Off-Road AchieverMountain biking is a demanding sport -- compromises and shortcuts when it comes to gear are never a good idea. The 4Forty is built to withstand the rigors of a trail-riding life; with generous ventilation, the comfort of Float Fit and built-in Sweat Guide, extended rear coverage, a full hard shell, adjustable visor and integrated MIPS protection. Boasting the comfort, protection and broadly capable features of helmets costing twice a smuch, the 4Forty is a bantamweight, all-conditions, all-kinds-of-trail champion packing a heavyweight value. Key Features: Fusion In-Mold polycarbonate shell - A process pioneered by Bell bonds the helmet\'s outer shell to the EPS foam liner to create a sturdier helmet.,Float Fit - A minimalist, lightweight fit system with an easy-to-turn rubber overmolded dial for adjustments (integrated with MIPS),15 vents,GoggleGuide adjustable visor: accommodates both goggles and glasses,No-Twist Tri-Glides: Quick-adjust fasteners that help keep straps flat and properly positioned,Sweat Guide pad design pulls moisture away from the brow pad and away from eyewear,CE EN1078 certified,. Construction: Fusion In-Mold polycarbonate shell - A process pioneered by Bell bonds the helmet\'s outer shell to the EPS foam liner to create a sturdier helmet. Fit System: Float Fit - A minimalist, lightweight fit system with an easy-to-turn rubber overmolded dial for adjustments (integrated with MIPS),No-Twist Tri-Glides: Quick-adjust fasteners that help keep straps flat and properly positioned,. Weight: 324 grams (size M)