Go light. Go Far. From skin track to boot pack and summit bids, the Summit snow helmet is our lightweight go-to lid for backcountry touring and ski mountaineering. Its triple certified design meets global alpine ski certs plus international mountaineering standards. The design blends a minimalist approach with mountaineering-specific details to keep it ultra-light yet ready for alpine pursuits. Zonal KOROYD® and Mips® impact protection absorb energy in the event of a fall. Smith Flexible Fit System, featuring BOA® offers a micro-adjustable fit which also collapses into the helmet for easy stuffing into your pack. External bungee loops offer secure attachment to the outside of a pack, too. Integrated headlamp strap routing keeps a light in place, and a beanie and ball cap-compatible design lets you match the weather conditions. Thirty-three fixed vents keep the air moving and your goggles or glasses fog-free. Go ahead and set your sights on the summit. Product Details Protection Hybrid shell construction blends a durable exterior with a lightweight in-molded shell for durability where you need it most while keeping the helmet light Zonal KOROYD® coverage for lightweight, energy-absorbing and ventilated impact protection Mips® Brain Protection System reduces rotational forces caused by angled impacts to the head Certifications: ASTM F 2040, CE EN 1077: 2007 CLASS B, EN 12492 Fit / Integration BOA® 360 Fit System offers the most adjustable fit with the turn of a dial for on-the-fly micro-adjustability Designed for ultimate integration with Smith goggles for maximum comfort and venting AirEvac ventilation system integrates with Smith goggles for fog-free lenses Features 33 fixed vents for consistent airflow Lightweight, technical knit liner included Ionic+® antimicrobial lining offers sweat-activated odor control Integrated headlamp strap routing keeps gear in place Beanie and ball cap compatible Weight (Size M): 16oz / 400g