Overboard 5 litre dry tube bag description thanks to welded seams and our trusty fold seal system this dry sack is 100 percent waterproof suitable for quick submersion and even floats when dropped in water made of nylon coated pvc tarpaulin this dry sack is also super durable and easy to wipe clean meaning it can take a bit of a beating a fully adjustable and removable strap means you can carry this bag hands free while loading your craft or bringing your stuff to the beach all this make