[Large capacity]: The swim backpack size is 36 * 13 * 25cm/14.17 * 5.12 * 9.84 inches. There is a small zippered pocket on the outside of the backpack, which can store small items such as glasses, hats, tickets, etc.[Backpack Material]:Made of waterproof Oxford fabric and durable zipper, lightweight and durable, not easy to scratch or tear, weighing only 0.44 pounds.[Adjustable shoulder straps]: Wide shoulder straps are more comfortable and relieve shoulder pressure. The shoulder strap can be easily adjusted to the appropriate length.[Wet and dry separation]: The backpack is divided into two compartments: wet and dry, and a shoe compartment. Wet items in damp places: swimsuits, towels, hats, etc. Dry areas for dry items: clothing, snacks, etc. The bottom of the backpack can hold shoes or toiletries.[Multi functional use]: Suitable for various activities such as swim, sports, beach, hiking, camp, picnics, travel, etc.