Casual computer backpack

A: (without USB and headphones)
B: (USB + headphone jack)
C: (USB + headphone jack + hanging ring)
D: (USB + headphone jack + hanging ring + small hanging bag)

Product size: 31cm wide, 45cm high and 20cm thick

Material: fabric - high quality wear-resistant PU, polyester, accessories exquisite metal accessories

Backpack structure: main bag X1, outer buckle bag X1, 15.6-inch laptop head X1, inner patch bag X2, small side bag X2