Helmet Fox Speedframe Pro-21 (pew gry) S: Performance-focused open-face trail helmet The Speedframe Pro Helmet has earned Virginia Tech’s best rating (5 STARS) in its Bicycle Helmet Ratings program. Designed with input from our pro mountain bike athletes, this top-tier open-face mountain bike helmet offers a market-leading feature set including MIPS™, an easily adjustable multi-position visor, and a 360-degree fit system. The pro version is equipped with a Varizorb™ dual-density EPS liner, Fidlock® SNAP helmet buckle, and an XT2® antimicrobial comfort liner.