- 600D HDTEX Dobby polyester.- Large capacity top loading main compartment. - Inner mesh organizer panel for easy access to important items. - Separate lower sleeping bag compartment with zippered divider to keep gear organized and balanced. - Hydration bladder pocket with dual hose outlet. Heavy duty, #10 nylon coil zipper on the three main compartment openings. Premium thermo-moulded shoulder straps with easy-to-adjust deluxe Air-Flow back panel. Extra-large front pocket panel with a multi-compartment field organizer and zippered mesh panel. Daisy chains and ice-axe loops for securing equipment. External storage options: 4 zippered side pockets, 2 mesh side pockets and waist pouch pocket. Size: 4575 in3 (75 L).