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. Since the first M.U.L.E. launched in 1996, mountain bikers have been telling us that it hits the sweet spot of size vs. storage: it’s lightweight, but big enough to carry three liters of water and a day’s worth of snacks and gear.