MOUNTAINTOP Lightweight Waterproof Dry Bag with Shoulder Strap WATERPROOF DRY BAGS SET GUARANTEED keeping all your gear protected no matter what the conditions! from being plunged into white water on an extreme kayak run, hiking in torrential rain or at the beach, your gear is protected & safe. ADJUSTABLE SHOULDER STRAP:Our dry bags come with an adjustable shoulder strap,Adjust the length of you need. PERFECT SIZE: 5L:16.53 x 11.41 inches(42 x 29cm); 10L: 22.04 x 11.41 inches(56 x 29cm); 20L: 27.16 x 14.17 inches(69 x 36cm). HOW TO USE A DRY BAG! -1. Push down to force excess air out. 2. Roll neck tightly towards the front of the bag. 3. Roll neck tightly over plastic fastener 3~5 times. 4. Attach the buckle at the top of the bag, whilst also creating a handle. WARRANTY- Includes 90 days limited warranty.