The Lightest And Most Breathable Full-Face Helmet Fox Have Ever Produced Conquer the mountain with this full-face protection specialist. The Proframe Blocked Helmet is the original full-face trail helmet and is still the market leader. Designed to meet the needs of all-mountain riders and enduro racers, it packs MIPS technology and a dual-density EPS liner into a superlight shell along with our patented, fully integrated chin bar. The Proframe Helmet has 15 intake and 9 exhaust vents which provide exceptional airflow and breathability on both climbs and descents. Thanks to its fixed design, there's no need to stop, remove, and store the chin bar. Ride wide open with the Proframe!