Big berms, rock gardens or flowy rollers. No matter the trail, get after it with confidence in the Smith Engage mountain bike helmet. Zonal Koroyd complements MIPS for energy-absorbing impact protection in the event of a crash. A dial adjustable fit and extended back coverage provide a locked-in feel. On hot days or exposed climbs, 20 fixed vents and our AirEvac ventilation system keep you cool and comfortable. Channels on the front make it easy to stow eyewear and a two-position visor rotates up for on-the-go goggle storage. Lightweight in-mold construction, 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 CPSC and CE EN 1078 certified Adjustable dial fit system for a customized fit Designed for ultimate integration with Smith performance eyewear for maximum comfort, venting and storage convenience AirEvac ventilation system integrates with Smith eyewear