There's a reason this is one of our bestselling, longest-running packs: it's got everything you need, and nothing you don't. The M.U.L.E. has a narrow-gauge design that keeps it light and maneuverable-so even when it's fully loaded for a day of mountain biking, it won't get in your way. The latest edition is built around the brand new Crux reservoir, which is even easier to load and refill, and delivers more water with every sip.