Wolfyok 20L/10L Dry Bag Roll Top Waterproof Floating Dry Sack Dry Gear Bag with Adjustable Shoulder Straps for Boating Kayaking Fishing Rafting Camping Canoeing Backpacking Hiking Wolfyok Dry Bag, which is made by100% WATERPROOF MATERIAL - PVC:Durable and keep your valuables dry at all times. It is suitable for travelling, camping, hiking, hunting, skiing and all water sports including boating, kayaking and rafting, etc WITH ADJUSTABLE AND REMOVABLE SHOULDER STRAP: each Wolfyok dry sack includes a shoulder strap ( 10L ) / 2 straps ( 20L ); All straps are easily removable and adjustable. When you are walking or swimming, the strap is long enough so you can sling it across your back DURABLE AND STRONG: Wolfyok dry bag is strong and durable, comfortable to carry, suitable to keep valuables dry in any wet situation. Thick PVC material provides protection from abrasion for screens and glass, the premium quality will not let you down DIFFERENT SIZE AND COLOR CAN MEET YOUR DEMAND: This dry sack has 2 sizes and 2 colors which can meet your different needs and still being able to easily carry. 10L ( yellow ): 15.3 x 7.9 inches ( 39 x 20 cm ); 20L ( blue ): 17.7 x 9.4 inches ( 45 x 24 cm ) SIMPLE TO USE: 1. Put your wallet, money, clothes, cell phone and keys etc in the dry bag; 2. Fold the edge opening for 3 - 5 times; 3. Lock the buckle at the top of the bag; 4. Whilst creating a handle. Warranty Wolfyok offers one year warranty for all the item it sells and pursues the best customer service on Amazon.