Watershed created and patented a waterproof closure system without equal. Watershed design and construct fully-submersible, airtight drybags. The Watershed bags are made from fabric that would withstand years of abrasion, UV exposure, temperature extremes, and possible exposure to fuels and chemicals. Each and every bag is inspected to ensure that it is 100% leak proof. Mil-spec webbing, hardware, and stitching complete the details.