The bag is made from 1000Denier nylon Cordura which is very cut and abrasion resistant. It has a double-ply bottom for extra reinforcement. The 2" web handles wrap completely around the bag for extra strength. They are attached in such a way that the bag can be carried like a backpack . There is one large outside pocket on one end of the bag and two smaller pockets on the other end. The small pockets have the international "Diver Down" symbol on them. All pockets have an industrial self repairing nylon zipper. This bag is large enough to hold air tanks plus all the accessories needed for scuba diving. There is an optional adjustable shoulder strap available # 3059-2.