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.
In hot weather, the padded back and adjustable padded shoulder straps with "Stay-Cool" mesh keep you cool and comfortable. Hydration is critical, especially on long treks, and it's never been easier with the two hydration ports securely hidden on the straps. A 2.5-liter hydration bladder is also included in the hydration pocket on the rear panel. It's perfect for outdoor activities like hiking and cycling, as well as single-day backpacking.

There's also a top carrying handle and loop panels for attaching IDs and patches.
Comes with a 2" x 3" Fox Tactical® patch in matching trim color
 
Specs:
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