Features: Hydration Capacity: 100 oz (3 L) Total Volume: 183 cu in (3 L) Includes the 100 oz (3 L) OMEGA Water Beast Reservoir with HydroLink Exit Port Pack Weight: 1.5 lbs (.7 kg) with empty reservoir Materials: 500D Cordura Fabric front panel and yoke > 420D High Density Nylon back panel > 420D High Density Nylon stow-away panel for shoulder harness webbing > 210D Nylon lining > Nylon webbing Pack Dimensions: 18 in x 10 in x 3.5 in (460 mm x 250 mm x 90 mm)