Men's simple casual backpack

Opening method: zipper
Material: Polyester
Function: Waterproof
Hardness: Medium
pattern: plain
Applicable gift-giving occasions: business gifts
Lining texture: polyester
Accessories type: rope buckle
Strap root number: double root
Popular elements: color contrast
Lifting parts: soft handle
Type of outer bag: digging bag
Bag shapes: square vertical section

Style 1: black

Style 2: Black upgrade version-with USB interface