-Never worry about your floating bag dropping it in water or water getting in. Unique water-tight overlap roll top provides the best-in-class waterproof performance. .Good for any outdoor moments. - Adjustable shoulder straps, backpack type, very convenience, to free your hands, and for comfort when carrying heavier loads. Buckle on top makes an easy to carry handle. - Fold 3 times around the stiffening blade and then lock the buckle. It can be rolled or folded for saving space when not in use. -This waterproof barrel bag is ideal for river rafting, boating, sailing, swimming, and fishing, hiking, cycling,canoeing,kayaking,camping, etc. Works as storage bag or auxiliary floating life preserver. Specification: Material: Enviromental PVC Color: black, blue, yellow, pink,green Size: 5L- suit for 1 person 10L- suit for 1-2 person 15L- suit for 2 person 20L- suit for 2-3 person 30L- suit for 2-3 person (only for refference) Weight: 5L-272G, 10L-336G, 15L-360G, 20L-440G, 30L-487G