1.Material: microfiber synthetic leather, polyester 2. Function: waterproof, wear-resistant, anti-theft, load reduction 3. Accommodates computer size: 15.6 inches 4. Built-in manganese steel sheet, strong bearing capacity, three-dimensional version 5. Large-capacity multi-compartment design to meet the daily needs of going out 6. Hidden pocket design, safe and anti-theft 7. The back adopts hollow groove design to enhance air convection and effectively dissipate heat 8. The backpack has a USB charging hole, which is more convenient to use 9. Dimensions: 28 x 42 x 11 cm 10. Weight: 1450 grams 11. Note: Only backpacks will be sent for delivery, nothing else!