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. A Smith custom BOA 360 Fit System 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.ProtectionHybrid shell construction blends a durable exterior with a lightweight in-molded shell for durability where you need it most while keeping the helmet lightZonal Koroyd coverage for lightweight, energy-absorbing and ventilated impact protectionMIPS Brain Protection System reduces rotational forces caused by angled impacts to the headCertifications: ASTM F 2040, CE EN 1077: 2007 Class B, EN 12508Fit / IntegrationSmith x BOA custom fit system for a premium fitDesigned for ultimate integration with Smith goggles for maximum comfort and ventingAirEvac ventilation system integrates with Smith goggles for fog-free lensesFeatures33 fixed vents for consistent airflowLightweight, technical knit liner includedIonic+ antimicrobial lining offers sweat-activated odor controlIntegrated headlamp strap routing keeps gear in placeBeanie and ball cap compatibleWeight (Size M): 16oz / 400gComplies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older