Backpack canvas travel bag external usb charging interface with headphone hole junior high school student bag

Material: Canvas 
Processing methods: soft surface 
Hardness: medium 
pattern: plain
Style: Casual 
Lining texture: polyester cotton 
Accessories type: buckle 
Strap root number: double root
Popular elements: belt decoration 
Bag shapes: square vertical section
With or without tie rod: No 
Color: black, khaki, brown, dark gray