Hello Brenda, Thank you for your inquiry! The fabric composition of the SubGear Ecco Pack Dive Roller Backpack Bag is a Denier nylon, which is a unit of measuring the thickness/weight of a thinly spun fiber. It indicates the material's durability, plus the fineness of fiber filaments and yarns - both natural and synthetic. The higher the denier, the thicker the fiber; the lower the denier, the finer the fiber. Denier nylon is waterproof too. 600 Denier Nylon is in the middle range of toughness and durability. The bag is made of Denier Nylon. The manufacture does not state the specific "strength" of the material. By the way, the Ecco Pack Dive Roller bag weighs 10.1 lbs.
http://www.scuba.com/scuba-gear-26/018891/SubGear-Roller-Backpack-Dive-Bag.html If you have any questions or wish to place an order, please call us at 1-800-247-2822 or 949-221-9300.
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