Smith Mainline MIPS Bike HelmetMade for going big, going fast, or both, the Smith Mainline MTB Helmet is the brand's pinnacle, downhill certified enduro bike helmet. Give credit where credit's due thank your mom, your legs, and your gear for giving you the opportunity to land that rocky gap. 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