Backpack bag 1.Material:840D polyester, 2.Size:45cm*30cm*19.5cm, 3.Very comfortable strap and durable material, Backpack bag 1.Material:840D polyester,2.Size:45cm*30cm*19.5cm,3.Very comfortable strap and durable material4.Lead time for samples: 7 days, free of charge but need client to pay the delivery cost ,5. There is two zippers pocket on opening and two meshs for the water bottle,6.Newest ...