Trim and Compact Water System. Comes loaded with a 70 oz hydration engine, but can host the 100 oz hydration engine. 360 degrees of D-Rings, Stowable Straps, Insulated Tube, 500D Cordura. Carry it. MOLLE to it. MOLLE it to your pack, your armor or load bearing vest. Basically a water carrying pack, but has enough room for a few snacks and the ability to attach a separate pocket to the outside of the pack should you desire to carry more items.