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 protection, MIPS Safety System reduces rotational forces, Certifications: ASTM F 2040, CE EN 1077: 2007 CLASS B, EN 12506 FIT: Smith x BOA custom fit system for a premium fit INTEGRATION: 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, Integrated headlamp strap routing keeps gear in place, Beanie and ball cap compatible, Ionic+ lining offers sweat-activated control INCLUDED: Smith helmet bag Go light. Go Far. From skin track to boot pack and summit bids, the Smith 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 protection absorb energy. A Smith custom BOA 360 Fit System offers a micro-adjustable fit that 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.