Bell super 3r mips helmetthe best trail riding gear adapts to changing terrain thats the idea behind the bell super 3r mips mountain bike helmet the helmet is designed for the varying demands of all mountain riding which includes long grinder climbs at low speeds and wide open descents on rowdy trailsa removable chin bar makes the bell super 3r mips helmet uniquely suited to the all mountain experience basically you get two mtb helmets in one for long climbs remove the chin bar and stow