Come and see our amazing products. The Backpack with USB Charging Port is made of water-resistant and durable polyester fabric with metal zippers. It has comfortable airflow back design with thick but soft multi-panel ventilated padding giving you maximum back support. The breathable and adjustable shoulder straps relieve the stress on the shoulder. What's more, it has a USB charger outside and a built-in charging cable inside which can offer you a more convenient way to charge your phone while walking. Pls confirm further with us if any query about packing info, inventory status and time schedule.