1.Material: Oxford cloth, polyester 2. Function: breathable, waterproof, wear-resistant, shock-resistant, load-reducing, anti-theft 3. Accommodates computer size: 15.6 inches 4. Using high-quality fabric, waterproof and wear-resistant 5. Multifunctional shoulder strap design, can hang sunglasses and storage cards 6. Design of USB charging interface on the side of the bag 7. Comfortable handle, comfortable and durable 8. Double zipper pulls, more convenient to open and close 9. Breathable shoulder straps, comfortable to carry 10. Reflective strip design, safer to go out at night 11. The triangle is reinforced, which is strong and not easy to break 12. Dimensions: 43 x 30 x 15 cm 13. Weight: 820 grams 14. Note: Only backpacks will be sent for delivery, no other!