Durable, comfortable and practically unnoticeable, CamelBaks ThermoBak 2-liter will be your most relied on tool in the field. In fact, this system has proven itself with every branch of the US Military. Offering 70 ounces (2 liters) of clean water on command, youll be able to push harder and longer. And when it is time to refill, external access keeps your downtime to a minimum. The worlds standard. Features: Exterior fillport with ergonomic handle for filling on the go. Positive shut-off HydroLock valve. Quick-release shoulder straps unclip for easy removal. Tough, abrasion-resistant 1000D Cordura exterior. Convenient Velcro strap management. Specifications: Capacity: 70 oz (2.0 liters), Total Cargo: Water Only, Weight Empty: 9 oz