1. Material: PC, polyester 2. Function: waterproof, wear-resistant, anti-theft, shock-resistant, capacity expansion, load reduction 3. Accommodates computer size: 17.3 inches 4. The PC is pressed into one piece, and carbon fiber material is added, which is wear-resistant and impact-resistant. 5. The fan-shaped half-open bag design makes it more convenient to take items 6. The back adopts hollow groove design to enhance air convection and effectively dissipate heat 7. The backpack has a USB charging hole, which is more convenient to use 8. Size: Regular version: 30 x 47 x 8 cm, Password version: 30 x 47 x 11 cm 9. Weight: normal version: 1 kg, password version: 1.32 kg 10. Note: Only backpacks will be sent for delivery, nothing else! Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin