This is a race hydration backpack streamlined to be super light and made for gravel and MTB racing, or fast rides when you value speed over bringing gear. The OUTLANDER 2 XC is geared-up with our award winning patented No Dancing Monkey™ 4-point harness that makes the pack 100% bounce free in action. The unique stretchy harness allows a tight fit but gives that extra freedom to breathe and move.