Vanaheimr Men Business Laptop Bag Multifunctional USB Backpack Large Capacity Shoulder Bag 1. Large capacity multi-layer loading design, meet your daily needs 2. Air deflector back panel design, make the air flow freely, keep your back dry all the time, thickened pearl cotton, decompression and shock resistance 3. Thickened and widened ergonomic shoulder straps, balanced force, protect the spine, reduce the pressure on shoulders 4. External USB charging interface 5. Splash-proof fabric, wear-resistant, scratch-resistant and tear-resistant, not easy to penetrate water, water droplets automatically slide down, you can also walk freely on rainy days 6. With reflective strips, safer at night 7. Lightweight texture, light to carry 8. Trolley case fixing strap at the back, more convenient to carry when travelling 9. Comfortable carrying handle at the top, ergonomically designed, easy to save energy 10. Adjustable shoulder straps, easy to adjust according to your needs 11. The zip head is made of glossy hardware, thickened and polished, wear-resistant and bright 12. The bottom of the shoulder strap is reinforced with triangular dates, which is more sturdy and durable 13. The back is filled with honeycomb breathable sponge, which is shock absorbing, comfortable and breathable 14. Material: oxford cloth, polyester 15. Size: about 46 x 32 x 16cm 16. Weight: about 620g 17. Description: only the bag, does not contain other