Motorcycle Backpack Waterproof Motorcycle Hard Case Backpack Back Motor Backpack Usb Charging Interface Motocross Helmet Bag New SMALL SIZE SL-41 (1.1kg) Feature 1. Security anti-theft back bag 2. 15.6-inch digital compartment 3. iPad compartment 4. Shoulder car pocket,handing buckle 5. Chest strap 6. Expansion outer bag*2 7. Waterproof shell 8. Solid color shell 9. Pull rod fixing belt 10. Reduce the burden of engineering 11. USB charging interface 12. 180 opening and closing for easy access BIG SIZE SL-42 EVA SHELL & ABS SHELL (2kg) Feature 1. Can put motorcycle helmet 2. 17.3-inch digital compartment 3. USB charging interface 4. Can hold 15.6-inch game book 5. Cycling strap 6. Expansion outer bag*2 7. Shoulder card pocket,hanging buckle 8. Double warehouse deasign 9. Pull rod fixing belt 10. Waterproof sealing zipper 11. Password lock 12. Can be expanded 15cm 13. The burden of engineering and learning is reduced