Fox Proframe RS Nuf Helmet Lightweight, next-level full-face helmet. The Proframe RS Clyzo Helmet takes the lightweight breathability of the Proframe and takes it to the next level of safety and performance. Featuring the all-new Mips Integra Split protection system, which combines a dual density foam - for high and low speed impacts - and a low friction layer between the two layers designed to reduce rotational forces in a crash that would otherwise be transmitted to the brain. Designed to meet the needs of all-mountain riders and enduro racers, the increased ventilation and decreased surface contact of the helmet keep you cool on long rides, while the Ionic+ and anti-microbial liner and multi-sized cheek pads provide optimized comfort and fit. The updated BOA fit system offers micro-adjustability providing class-leading fit and security. The chinstrap utilizes a Fidlock magnetic closure system for easy-open and close, even with gloves. The 3-position adjustable visor with lock down screw is compatible with goggles. Those looking to capture every sweet run will appreciate the removable, under-visor GoPro mount on the Fox Proframe RS mountain bike helmet. BOA system to ensure exceptional fit and safety. MIPS Integra protection system that combines an EPP liner with an EPS layer and reduces rotational forces in the event of an impact. Adjustable visor with three goggle-compatible positions. Includes removable GoPro mount under the visor. Increased ventilation and reduced contact surface for improved cooling. Antimicrobial ionic lining and cheek pads for optimized fit. FIDLOCK magnetic closure. 22% ABS, 21% EPS, 15% PC, 13% PU, 9% PA, 5% EPP.