You can stay hydrated on the go with the Compact Modular Hydration Backpack. It has a space-saving design that does not compromise storage. On the inside, it contains a large main compartment, a front pocket, and two mesh accessory pockets. You can have even more storage options with the modular attachment points on the front face.Specifications and Features: Material: 600 Denier with PVC backing Size: 17" x 8" x 5" Capacity: 11 L / 680 cu Size Rank: 22nd largest Compartments: 2 Pockets: 2 External Hydration Ports: Dual (Ambidextrous) Weight: 4.7 lbs