Product information:

Applicable gender: male
Material: ABS+PC
Function: breathable, waterproof, wear-resistant, anti-theft, anti-vibration, lightening
Hardness: medium to soft
Pattern: plain
Lining texture: polyester
Strap root number: double root
Carrying: soft parts
Color: black, black for expanded version, gray for expanded version, black for dual warehouse upgrade and expanded version

Size Information:
Size: 45*32*12CM
Expanded version size: 45*32*12-22CM
Double warehouse upgrade expansion version: 45*32*13CM

Packing list: 

1*backpack