1. Material: polyester2. Opening method: zipper3. The internal structure of the bag: zipper pocket, mobile phone bag, ID bag, sandwich zipper bag4. Function: waterproof5. With USB charging port, easy to travel6. Shoulder strap length can be adjusted7. Smooth zipper, not easy to damage8. Comfortable to wear, strong and durable9. Weight: 0.25kg10. Size: 16x6x28cm