Features: Hydration Capacity: 845 oz (25 L) Total Volume: 1525.5 cu in (25 L) Includes an 845 oz (6 L) OMEGA Water Beast Reservoir with 2 HydroLink Exit Ports and 1/2" dia. fill hose Pack Weight: 3.22 lbs (1.45 kg) with empty reservoir Materials: 1000D Cordura Fabric front back shoulder strap front reservoir exit port flap cover and crossbar panel > Nylon 420D HD reservoir opening edge binding shoulder strap binding and shoulder strap back panel > Shoulder strap padded with EVA 10 mm > Front and back panel insulated with 3 mm and 5 mm PE Sponge > Nylon 210D PU for inside lining > Nylon webbing Pack Dimensions: 25 in x 19 in x 2 in (635 mm x 485 mm x 50 mm)