Give credit where credit';s due. Thank your mom, your legs, and your gear for giving you the opportunity to land that rocky gap. Made for going big, going fast, or both, the Smith Mainline is our pinnacle, downhill certified enduro bike helmet. Safety innovations like Koroyd and MIPS provide energy-absorbing impact protection so you have the confidence to get aggressive on the trail. It doesn';t matter if you';re slaying the EWS in Whistler or suffering through the last stage of your local enduro race, you need a breathable, lightweight helmet that pairs well with goggles and fits like a glove. The Mainline integrates with your bike goggles for efficient venting and fog-free vision. Multiple pad sets including liners and neck-rolls let you customize the fit.PRODUCT FEATURESProtection:Complete Koroyd coverage for lightweight, energy-absorbing and ventilated impact protectionMIPS Brain Protection System reduces rotational forces caused by angled impacts to the headCPSC, CE EN1078 and ASTM F1952 (Downhill) certifiedFit / Integration:Designed for ultimate integration with Smith MTB goggles for maximum comfort, fit, and ventingAirEvac ventilation system integrates with Smith goggles for fog-free lensesThree washable cheek pad kits, two crown liners and two neck rolls let you fine tune the fitD-ring chin strap fastener for a snug fitFeatures:21 fixed vents for consistent airflowAdjustable visorHybrid X-STATIC / XT2 anti-bacterial performance lining for odor resistanceWeight (Size M, MIPS): 27 oz / 770 gComplies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older.