The waterproof dry bag is made by rugged 500D PVC tarpaulin , vinyl-coated for waterproof protection. The premium quality buckles also provide secure watertight closure for the bag to keep your gear dry in any wet situation where the bag is not fully submerged. Waterproof dry backpacks keep your belongings safe and dry, perfect for various activities such as boating, kayaking, sailing, canoeing, surfing or fun on the beach. The price list is for 2L. Orders of 2000 pieces or greater are eligible for sea shipping. 100% guarantee for quality.