Expandable backpack

Capacity: 20-35L
Internal structure of the bag: ID bag, mobile phone bag, sandwich zipper bag, zipper pocket, computer slot
Opening method: zipper
Applicable gender: neutral / male and female
Material: Oxford spinning polyester
Function: waterproof, breathable, wear-resistant, anti-theft, lightening, shock resistance
Processing method: embossing
Hardness: medium to soft
pattern: plain
Style: Fashion Sports Outdoor Leisure
Lining texture: polyester
Strap root number: double root
Lifting parts: soft handle
Bag shapes: square vertical section
Carrying system: curved shoulder strap
Color: grey, black