When it comes to racing downhill at high speeds, full coverage is a necessity. Enter: the Troy Lee Designs D4 Carbon MIPS Bike Helmet – designed for full-face protection against the rocky trails ahead. Meticulously engineered for unrivaled safety, the D4 Helmet enlists the help of MIPS technology to reduce the likelihood of injury associated with rotational forces. When combined with an impact absorbing EPS liner, the MIPS protection system radiates impact forces across a wider surface area to minimize damage caused by a sudden hit to the head. Equipped with a moisture-wicking and quick-drying Ionic headliner for maximized comfort; a carbon fiber shell for amplified impact and penetration protection; and an innovative breakaway visor for unrivaled neck defense; the Troy Lee Designs D4 Bike Helmet overlooks no detail when it comes to on-trail safety.