The best trail riding gear adapts to changing terrain thats the idea behind the bell super 3r helmet with mips its designed for the varying demands of all mountain riding which includes long grinder climbs at low speeds and wide open descents on rowdy trails a removable chin bar makes the super 3r uniquely suited to the all mountain experience basically you get two helmets in one for long climbs remove the chin bar and stow it in your pack and when its time for more aggressive riding