The pack is 20" x 19" (at the widest point) x 12" with two large pockets on the back and two additional pocket on each side. If that isn't enough space, you can add to it using the many MOLLE PAL attachment points. It also features internal pockets, two radio pouches and room for two hydration bladders of three liters each (you can add more hydration carriers in the main compartment or externally, if you wish). The thickly padded adjustable shoulder and sternum straps can be removed to convert the pack to a carry-all by using the top and side nylon carry handles. Fully covered zippers with pulls, bottom bedroll loops and side compression straps to secure your load.