Theres a reason this is one of our bestselling, longest-running packs: its got everything you need, and nothing you dont. The M.U.L.E.® has a narrow-gauge design that keeps it light and maneuverableso even when its fully loaded for a day of mountain biking, it wont get in your way.Since Camelbak launched the first M.U.L.E. in 1996, mountain bikers have been telling them that it hits the sweet spot of size vs. storage: its lightweight, but big enough to carry three liters of water and a days worth of snacks and gear.Over the years, Camlebak have also added air channels to keep your back cool, universal helmet hooks, and clever compartments for stashing tools, keys and electronics. The latest version also features a magnetic tube trap that snaps easily into place, so you can hydrate without taking your eyes off the trail.Hydration Capacity: 100 oz / 3LTotal Capacity: 9L (549 cu in) + 3L ReservoirTotal Weight: 1 lb 5 oz / .61 kg (pack only)Dimensions: 19 x 10.5 x 2 inTorso Length: 16.5 in / 42 cmFabric: 70D / 210D diamond ripstop nylon w/ 70D / 140D block dobby nylonEmpty Reservoir Dimensions: XV. Multi-Layer EVA foam pods provide superior cross ventilation in a lightweight design.Full Reservoir Dimensions: Removable 20mm / .75" stabilityMaterials: Independent suspension with ultra light 3D mesh and perforated foam.