YUMQUA Waterproof Dry Bag Backpack for Women Men 5L/10L/20L 。?Waterproof - Use professional seamless technology. Our dry bag has the overall waterproof capability, making sure to keep your items and valuables dry when you do some water sports like boating and kayaking but not underwater sports ?Durable - Made by 0.02 in (0.6 mm) thick wear-resistant PVC material of the bottom and 0.01 in (0.3 mm) of the side, suitable for outdoor activities, waterproof bag nicely adapts to all kinds of weather and environment ?Multifunctional - Adjustable Shoulder Straps & Handle for shoulder carrying and backpack, very convenient for different occasions like boating, rafting, kayaking, swimming, mountaineering, etc. The lightweight dry bag won’t aggravate the burden of your arms or shoulder ?Visible - Transparent dry bag, easy to find your items without trouble, you don’t have to rummage through the bag to find your things, and it’s able to read the message on your phone or pad ?5 Sizes (5L/ 10L/ 20L/ 30L/ 40L) to choose - Great beach vacation and cruise ship essentials, a right choice for the gift to women and men, each bag comes with a free waterproof cell phone case, bring comprehensive waterproof protection to your water sports. You can control the size of the dry bag by the number of times you roll the top edge.