Hysenm 5L/20L/60L Ultralight PVC Waterproof Floating Cell Phone Pack Dry Sack with Shoulder Strap for Travel Camping Swimming Boating Surfing Drifting Skiing Made with thickened PVC and Polyester material, tear resistant, and waterproof with index of 20000mm Unique transparent design on the front, to make you see items inside clearly and convenient Adjustable and detached shoulder strap attached, convenient to adjust its length as needed and carry Fold down the top section of dry sack for 2 to 3 or more times, fold the stiffener to squeeze the air out and clip the buckle together to keep the water away Perfect for travel, outdoor, swimming, drifting, kayaking, canoeing, boating, floating, etc. Its strongly water resistant when floating partially on the surface (not 100% waterproof), so please do not make it fully submerged or underwater