BANGE BG-22005 Large Capacity Business Waterproof Backpack Travel Oxford Cloth Computer Backpack1. Fabric: Oxford cloth 2. Lining texture: polyester 3. Features: breathable, waterproof, wear resistant, shock resistant 4. Size: 31x49x18 cm 5. Net weight: 890g 6. Leather handle, more comfortable grip 7. USB charging port design, convenient for charging 8. After the zipper is opened, the capacity is expanded by 8 cm 9. 180 degree fully open backpack, expandable design, more convenient 10. Human body comfortable shoulder straps and honeycomb mesh