Material: Nylon Size: 25.5" x 17.5" x 6" Weighs: 2lbs, 13oz Features: 52 Liters, 3200 cubic inch capacity for main compartment. Mesh pocket on both side. Double zipper front pocket for Hydration pouch. Two draw straps in front which allow for expansion. Zippered storage top flap / pocket for easy access. Contain 2 internal aluminium frame. Also comes with chest strap, waist belt, Zippered top flap for extra storage on top, two water bottle holders, side compression straps for extra gear storage. Compare against the Kelty Pawnee 3300 which retails for $130 and is almost a full pound heavier.