Fox Proframe RS Heatstack Helmet The Helmet Your Head Deserves The Proframe RS Heatstack takes the lightweight breathability of the Proframe and elevates it to the next level of safety and performance. Featuring the all-new Mips(R) Integra Split protection system, which combines a dual-density foam for high and low speed impacts with a low friction layer between the two, it reduces rotational forces in a crash that would otherwise be transmitted to the brain, all in a striking new Heatstack colorway. Features Mips(R) Integra Split protection system combines an EPP inner shell with the EPS layer to reduce rotational forces in a crash BOA(R) dial fit system with 52 micro-adjustments for a precisely dialed fit, adjustable while wearing the helmet Four-point adjustable back cradle moves up or down your head to ensure the best fit possible3-position adjustable visor compatible with goggles, with a lock-down screw Removable under-visor Go Pro mount included for capturing every run Increased ventilation and decreased surface contact for improved cooling on long climbs Ionic+(TM) anti-microbial liner with two included cheek pad sets (thin pre-installed, thick optional) for a dialed, odor-resistant fit Fidlock(R) magnetic buckle for fast, easy open and close, even with gloves SPECIFICATIONSIntended Use Trail, Enduro, Downhill Protection Mips(R) Integra Split Construction Dual-density EPP/EPS foam Closure Fidlock(R) magnetic buckle Fit System BOA(R) dial, 4-point adjustable back cradle Weight820g (Size M)Certification ASTM F1952 (Downhill) | Fox Apparel | Proframe Rs Heatstack Helmet Men's | Size Medium In Dark Blue