Capacity: less than 20L
Internal structure of the bag: ID bag, mobile phone bag, zipper pocket, computer pocket
Opening method: zipper
Material: Oxford cloth
Whether with a lock: Yes
Function; waterproof, breathable, wear-resistant, anti-theft, burden reduction, earthquake resistance
Model: Backpack
Lining texture: polyester
Strap root number: double root
Type of outer bag: inner patch bag
Bag shapes: square vertical section
Color: light gray, black, dark blue, dark gray

Size: 31cm in width * 44cm in height * 15cm in thickness