Ozuko Business Laptop USB Backpack Men Schoolbag 1. Material: oxford cloth 2. Capacity: 20-35L 3. Function: breathable, waterproof, wear-resistant, shock-resistant, load-reducing 4. Computer size: 15.6 inches 5. Four-layer design, reasonable storage, accommodating short-term travel items 6. External USB charging port, convenient and fast 7. Large opening, more convenient for travel, the side is fully opened 90 degrees, and the inside is opened 60 degrees 8. Water-repellent fabric, effectively protect your personal belongings, more secure to use 9. Reflective LOGO, bring safety to your travel 10. Large area of ????breathable heat dissipation on the back, S-shaped shoulder straps, comfortable and close-fitting design 11. Can be put on a trolley case, more convenient for travel 12. Two-way zipper, thick and easy to pull, large opening 13. Back zipper pocket, can hide the double shoulder straps to turn it into a single shoulder bag 14. Size: 42x28x8 cm