CamelBak Ambush External fill access allows for a quick refill without removing pack Side-release shoulder straps for rapid removal Multiple drink tube exit ports for routing drink tube over the shoulder or under an arm Top and bottom external pockets hold small essentials Lightweight, durable Rip-Stop Cordura Fabric Hydration Capacity: 100 oz / 3 L Total Weight (Pack and Reservoir): 1.65 lbs / 748 g