The Proframe is the lightest, most breathable full-face mountain bike helmet Fox has ever created. Designed to meet the needs of all-mountain riders and enduro racers, the Proframe packs MIPS protection technology and a dual-density Varizorb EPS liner into a superlight shell with Fox's patented, fully integrated chinbar. Its 15 intake and nine exhaust vents provide exceptional airflow and breathability on the climb and the descent, and with a fixed design, there's no need to deal with a removable chinbar—ride wide open with the Fox Proframe Helmet. MIPS and dual-density Varizorb EPS liner provide improved protection during a crash Fox integrated chinbar is secured to the helmet and meets ASTM downhill standards Liner system is highly breathable, moisture-wicking, and anti-microbial Summer 2022 product Equipped With Multi-directional Impact Protection System (MIPS) MIPS Brain Protection System is a helmet-integrated, low-friction layer designed to reduce rotational motion transferred to the brain from angled impacts to the head. Varizorb EPS Varizorb dual-density EPS liners are meant to provide improved impact protection by spreading the forces of impact across a wider surface area. Fidlock Fidlock patented technology allows fasteners to be opened and closed with just one hand—even when wearing gloves.