There%u2019s a reason the M.U.L.E. is one of CamelBak's bestselling, longest-running packs: it%u2019s got everything you need, and nothing you don%u2019t!The CamelBak M.U.LE. Hydration Pack has a narrow-gauge design that keeps it light and maneuverable%u2014so even when it%u2019s fully loaded for a day of mountain biking, it won%u2019t 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. Since CamelBak launched the first M.U.L.E. in 1996, mountain bikers have been saying that it hits the sweet spot of size vs. storage: it%u2019s lightweight, but big enough to carry three liters of water and a day%u2019s worth of snacks and gear. Over the years, CamelBak also added air channels to keep your back cool, universal helmet hooks, and clever compartments for stashing tools, keys and electronics. The latest M.U.L.E. also features a magnetic tube trap that snaps easily