This Dry Bag is 100% waterproof thanks to is welded seams and Over Boards trusty fold seal system. This Dry tube is suitable for quick submersion and also floats when it's dropped in water. Constructed from nylon-coated PVC tarpaulin, so its a dry bag built to be tuff!, Also made with a fully adjustable and removable strap means you can carry it and be hands-free, All this makes the Overboard 12 litre Dry Tube the perfect accessory on the water.