Made of Water Resistant and Durable Polyester Fabric with metal zippers.Ensure a secure & long-lasting usage everyday & weekend.Serve you well as professional office work bag, USB charging bagpack, perfects for business traveling, weekend getaways, shopping & outdoor activities in daily life.

● Expansion design, double capacity when opening10cm hidden extension layer changes capacity at will.
● With USB charging port
● Made of Water Resistant and Durable Polyester Fabric
● 17.3" laptop compartment
● Colour-coordinated YKK explosion-proof zippers

Specifications:
Measurements: 33 x 17 x 49CM（12.9”x6.69”x19.29”）
Weight: 1.23KG（2.71lb）
Capacity: 27.5L before expansion, 43.6L after expansion

What's in The Box:
1x OIWAS Large Capacity Expandable Backpack