When designing the Smith Convoy, we set out to create a mountain bike helmet that felt like it was tailor-made for your head. An adjustable dial on the back lets you fine-tune the fit for comfort. When it comes to comfort and protection, the helmet ticks all the boxes. It has a Mips® liner system and all the ventilation you'll need through the hottest days on the trail. In addition to easy integration with performance eyewear, it also features outside channels that store your shades when dusk sets in. Product Details Protection Lightweight in-mold construction Mips® Brain Protection System reduces rotational forces caused by angled impacts to the head Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older as well as CE EN 1078 and AS/NZS 2063 Fit / Integration Adjustable dial fit system for a customized fit Designed for ultimate integration with Smith performance eyewear and goggles for maximum comfort, venting and storage convenience AirEvac™ ventilation system integrates with Smith eyewear for fog-free lenses Features 20 fixed vents for consistent airflow Integrated visor Performance comfort lining Lightweight, low-bulk single-layer webbing Weight (Size M, Mips®): 11 oz / 300 g