Exterior Universal straps for optional pouches and inside ider. Expands to hold all of your gear. Front, rear & side storage pouches with full-zip main compartment. Hydration compatible. Top & side nylon carry handles. Heavily padded, adjustable and removable shoulder and sternum straps. Fully covered zippers with pulls. Hidden zippered compartment in back pad. 22 Liter (1343 cubic inches) capacity.