CamelBak M.U.L.E. MilTac 100oz 3 Liter Hydration Backpack Hydration Plus Cargo Zipper closure Hydration Capacity: 100 oz / 3 L Total Capacity: 671 cu. In / 11 L Total Weight: 2.75 lbs / 1.2 kg Fabric: 500D Cordura Fabric front panel, gusset and shoulder harness front side, 420D High Density Nylon on shoulder harness back side, 7 mm EVA foam shoulder harness, 5 mm Closed Cell PE foam on back panel and inside hydration compartment for insulation QL HydroLock one-handed flow control