Simple to use:. 1. Put your wallet, money, clothes, cell phone and keys etc. in the dry bag. 2. Fold the edge opening 3-5 times. 3. Lock the buckle at the top of the bag. 100% waterproof backpack. Reliable Protection - Meant to last for years. Made from durable, heavy-duty 500D PVC tarpaulin. Great for even the most rugged use. Backpack Strap - Comes with a adjustable backpack strap for easy comfortable carrying especially when carrying over long distances. Mesh Sides & Easy Access Front Pocket is a perfect place to store your already waterproof accessories, wet swimwear or gloves. Carry up to two water bottles without sacrificing space in your pack.. Great for Boating / Kayaking / Fishing / Rafting / Camping / Canoeing / Snowboarding. Front pocket is not 100% waterproof.