1. Flip cover design, built-in shock-proof cushion, elastic fixing strap 2. Tough and soft shoulder straps, comfortable and breathable 3. The back adopts multi-layer honeycomb mesh elastic foam pad, which is refreshing and breathable 4. Trolley pocket design, easy to use 5. Comfortable handle, shoulder strap can be adjusted freely 6. Material: polyester 7. Applicable gender: male 8. Size: about 32 x 45 x 18cm 9. Weight: about 870 grams