Chinook Vector Internal Frame Expedition Pack, Orange, 75-Liter 600D HDTEX Dobby polyester and heavy duty #10 nylon coil zipper on the three main compartment openings Large capacity top loading main compartment and separate lower sleeping bag compartment with zippered divider to keep gear organized and balanced Premium thermo-molded shoulder straps with easy-to-adjust deluxe Air-Flow back panel and hydration bladder pocket with dual hose outlet Extra-large front pocket panel with a multi-compartment field organizer and zippered mesh panel; inner mesh organizer panel Capacity: 4575 cubic Inch (75 L)