This is an 830 cubic inch Hydration/Gear pack uniquely designed for modular attachment of any BlackHawk pouch. Also provided is a strip of "daisy chain" attachment points. Great for carrying food, gear, electronics, and clothing. All compartments have YKK zippers with sure-grip pulls. This unit holds approximately 60-70% more gear than the Tsunami. BTS modular attachment points are an excellent way to efficiently pack more gear and cargo. Features include: IVS compression molded foam intercooler back panel, revitalizes, cools, and enhances pack support and performance. Easy access reservoir pocket. Tube routing system. Additional compartments for 2nd reservoir. Fully padded contour shoulder harness includes sternum strap and waist belt. Made of 1000D NyTaneon. BTS modular attachment system on top and bottom of outside compartments. 2 built in compression/cinch straps for outside compartments. Reinforced drag/carry handle. Comes standard with our 100 oz. reservoir, insulated tube cover, Storm flow Delta bite valve and StormLock on-off valve.