Product information:

Capacity: 20-35L
Internal structure of bag: zipper bag mobile phone bag certificate bag sandwich zipper bag computer bag
Opening method: zipper
Material: Oxford cloth
Functions: breathable waterproof wear-resistant USB charging load reduction dry and wet separation
Number of shoulder straps: double
Color: black 
Size: 32 * 20 * 46cm
Computer size: 15.6 inches

Packing list:

Knapsack*1