Come and Check Our Branding Solutions.This backpack with a USB port is made of polyester fiber. There is a zippered front pocket for quick access to items. 1 large main compartment, suitable for clothes, pens, books, etc. 1 zippered back pocket for mobile phones. A side mesh bag is used for bottling. There is also a USB port for charging the power bank. Very suitable for gym, outdoor sports, students. The price includes freight, more than 500pcs shipping by sea. Pls check inventory and detailed info before placing your orders.