Product information:

Luggage size: large
Capacity: below 20L
The internal structure of the bag: mesh bag, zipper pocket, mobile phone bag
Opening method: zipper
Applicable gender: Neutral
Material: Polyester
With or without rain cover; yes
Hardness: hard
Pattern: plain
Style: street trend
Lining texture: polyester
Strap root number: double root
Popular element: locomotive
Carrying parts: soft handle
Outer bag type: inner patch pocket
Bag shape: vertical square
Scene: Casual
Color: black medium, space silver medium, space silver small, black small, black large (for motorcycle 3XL helmet),space silver large (for motorcycle 3XL helmet)
Waterproof degree: fully waterproof
Accommodating computer size: 16 inches

The price is more than 50$, not responsible for any after-sales, mind not to shoot

Size Information:

Small 425*260*200 mm
Medium 460*290*220 mm

Packing list:

Backpack*1