OUMANTU 3123 Large Capacity Waterproof Wear-resistant Business Casual Backpack with USB Port 1. Water-repellent fabric, wear-resistant and tear-resistant; 2. USB port design on the side of the backpack makes charging more convenient; 3. Thick handle on the top of the backpack is easy to pull and hang; 4. The shoulder straps are reinforced with bastards, strong load-bearing capacity and durable; 5. Exquisite zipper head, smooth and durable; 6. Triangular fixed strap to increase load-bearing capacity; 7. Breathable shoulder straps, high comfort; 8. Hardware adjustment buckle, the length of the shoulder strap can be adjusted according to height; 9. Material: Oxford cloth 10. Lining: Polyester 11. Size: about 41 x 12 x 31cm 12. Weight: about 650g 13. This product is manually measured, and there may be an error of 0.1-0.2 mm and 0.1-0.2 grams in length and weight; due to display and light problems, there may be a slight color difference. Please refer to the actual product 14. Note: The shipment only includes the backpack, not other items in the picture