OUTAD 30L(7.9gal) Kayaking Dry Bag, Compression Sack, IPX7 Waterproof Rating, Perfect for Camping and Water Sports such as Canyoneering, Boating, Rafting and Swimming MATERIAL: 500D Double-coated PVC tarpaulin with an IPX7 waterproof rating (Submersion in 3.3ft(1m) of water for up to 30 minutes). HUGE CAPACITY: 30L(7.9gal) capacity holds essential with ease. DOUBLE AIR VALVE: One to let air out for space-saving and one to blow air in for water flotation. Can be used as a compression sack as well as a dry bag. CONVENIENT: Weighs 23oz(0.67kg), the included 2 adjustable shoulder straps and front grab handle allow convenient carry. TIPS: Give it a water wash and air dry before using to eliminate odor. Roll the opening at least 3 times to seal completely.