Material: waterproof nylon

Size: 22 centimeters high, 19 centimeters wide and 9 centimeters thick

Structure: there are 4 zipper bags in the first 1, 1 in the back, 1 in the inside, and 1 in the middle.

Knapsack: a single shoulder stride. The shoulder strap can be adjusted. The longest shoulder strap is 140-150 centimeters.