Zunammy dry bag, which is made by 100% WATERPROOF MATERIAL – PVC: is durable and can 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: 20L, 10L , & 5L Dry Bag has 2 shoulder straps. 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: Zunammy Pack dry bag is strong and durable, comfortable to carry, suitable to keep valuables dry in any wet situation, the premium quality will not let you down. 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.