Watertight at 300 feet submersion. Imagine the heaviest duty freezer bag you’ve ever seen — and then multiple that strength by 100. Our airtight ZipDry® closure has been tested to over 300 feet … The U.S. Navy has tested Watershed drybags to 100 meters submersion without any leakage. From duffels to backpacks and deck bags, their lineup … Discover waterproof dry bag collections. Choose from compact personal sizes to large duffel bags for organized, protected gear storage on any expedition. Shop for Watershed Dry Bags at REI - Browse our extensive selection of trusted outdoor brands and high-quality recreation gear. Top quality, great selection and expert advice you can trust. Rugged, thick-sided fabric and welded seams lock out water, while … Shop for WatershedDryBags at REI - Browse our extensive selection of trusted outdoor brands and high-quality recreation gear. Top quality, great selection and expert advice you can trust.