Key Features Mips® equipped BOA® Fit System for class-leading fit and security Goggle and sunglasses compatible Removable under visor GoPro mount included FIDLOCK magnetic closure for easy operation Large vents keep you cool Meets the NTA-8776 E-bike helmet certification standard Description Maximum coverage open face mountain bike helmet The Dropframe Pro Helmet is a game-changing, open-faced 3/4 enduro helmet. It features Mips®, the BOA® Fit System for class-leading fit and security, increased ventilation, plus an ionic+® anti-microbial liner and cheek pads to optimize fit. With its increased coverage for the ears, jaw, and back of the head, this MTB helmet provides the most complete coverage we offer in an open-face helmet. Specifications BOA® Fit System for class-leading fit and security Mips® added protection system has been proven to reduce the rotational motion when implemented in a helmet by absorbing and redirecting energies and forces otherwise transmitted to the brain 3-position adjustable visor compatible with goggles Removable under visor GoPro mount included Big Bore front vents include eyewear storage recess Increased ventilation and decreased surface contact area improve cooling Ionic+® anti-microbial liner and cheek pads to optimize fit FIDLOCK magnetic closure Meets the NTA-8776 E-bike helmet certification standard Size & Fit "Size Sizes: small, medium, and large (see size guide for measurements) How to Dial Your Fit BOA® dial: micro adjustments - counterclockwise to loosen, clockwise to tighten - allows for a precisely dialed fit. Adjust while wearing the helmet. Back cradle: four points of adjustment move the cradle up or down your head to ensure the best fit possible. Comes with additional cheek pads and liners for a personalized fit Select thinner or thicker pads to achieve a tighter or looser fit according to your preferences " Materials & Care For care instructions, see our Helmet Care Guide Note: Avoid exposure to aerosol sprays like bug repellent and sunscreens as they can cause your helmet's finish to peel Materials: 30% EPS, 11% EVA, 10% polycarbonate, 13% nylon, 11% Pom, 14% Tpee