This bag made with waterproof 500D PVC fabric protects your phones, camera, clothes, documents and snacks from Water, Sand, Dust and Dirt. The parts of adjustable single shoulder strap & hook ensure boating, Running, Cycling, sailing, canoeing, surfing and other sports safety. The prices base on 2L capacity, 5L, 10L,20L,30L or more large size for customize.