Chinook Shasta Internal Frame Expedition Pack 600D HDTEX Diamond rip stop polyester, 600 HDTEX Polyester and heavy duty #10 nylon coil zipper on lower opening Large capacity top loading main compartment and hide away waterproof rain cover Padded back and shoulder straps with Air-Flow mesh and hydration bladder pocket with dual hose outlet Torso adjustment and adjustable stabilizer straps Capacity: 3965 cubic Inch (65 L)