Camelbak Ambush Mil Spec Antidote Hydration Backpack Hydration capacity: 100 oz / 3L Total Capacity: 3.28L (200 cu in) + 3L Reservoir Total Weight: 1.6 lbs / .71 kg (pack only) Dimensions: 16 in x 10 in x 6 in (41 cm x 25 cm x 15 cm) Fabric: 500D Ripstop Cordura fabric front panel, gusset and shoulder harness front side &gt; 420D high density nylon on shoulder harness and back panel &gt; 5 mm closed cell PE foam on back panel and inside hydration compartment &gt; Nylon webbing