Checking in at just 11oz, K2's Route Helmet is the lightest snow helmet on the market. It takes its cues from climbing helmets—just check out the ventilation system. The polycarbonate shell and EPS foam liner are fully certified for skiing, snowboarding, and even biking protection. The earpads are removable, as are the fully adjustable headlamp and goggle clips, making for a fully customizable package whether we're in the resort or the backcountry.