This bag isn"t submergible, but it will keep your beach-residing items (towel, shirt, pants, jacket, camera, PDA, and cell phone) dry. The secret is the polyurethane-coated material used to construct this bag. This durable duffel is uniquely designed with plastic stiffeners to effectively seal the roll top. Simply roll the top three times for a reliable seal in any conditions. The durable 600-D (denier) Polyester material is coated with PU (polyurethane) that makes the Dry Duffle Bag puncture and tear resistant. The materials are welded together to create a waterproof seal that provides strength and protection from rugged environments. The embroidered AKONA handle is fastened with a Velcro closure that is reinforced with box stitching for added durability. Bag also has two nylon compression straps with 1" (2.5 cm) buckles that reinforce the waterproof seal. Molded D-rings for an optional shoulder strap (not included), make this option an easy way to carry the bag. Bag measures 21" x 9" x 9" (53.3 x 23 x 23 cm) with 1,701 cubic inches (28 liters) of internal volume, and bag comes with a 24 month limited warranty.