The high density water resistant material can help you to separate dry items and wet items. Made of waterproof oxford and durable polyester, light and durable, not easy to scratch or tear. The backpack size is 16.5" x 7.9" x 13.8". Inside the backpack there are small zippered pockets that can store small items such as mobile phones, watches, tickets, etc. The backpack is divided into a dry and wet compartment and a shoe compartment. Wet items in damp places, swimsuits, towels, hats, etc. Dry area for drying items, clothes, snacks, etc. The bottom of the backpack can hold shoes or toiletries. Wide shoulder straps are more comfortable and relieve shoulder pressure. The shoulder straps can be easily adjusted to the right length. Can be order under MOQ. Qty more than 300 pcs are ship via sea.