Backpack size:
small: 30*18*48.5cm (can hold 15.6-inch computer),
medium: 32*21*53cm (can hold 17-inch computer),
large: 40*23*60cm (can hold 17-inch computer).
Backpack Capacity: 50/60/80L
The internal structure of the bag: zipper pocket, mobile phone pocket, document pocket, interlayer zipper pocket, computer pocket, camera pocket
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small: 30*18*48.5cm (can hold 15.6-inch computer),
medium: 32*21*53cm (can hold 17-inch computer),
large: 40*23*60cm (can hold 17-inch computer).
Backpack Capacity: 50/60/80L
The internal structure of the bag: zipper pocket, mobile phone pocket, document pocket, interlayer zipper pocket, computer pocket, camera pocket
Trave Backpack 50L 60L 80L Multifunction Hiking Laptop USB Charging For Men Bags Expandable Business Backpacks With Shoes Pocket