Specifications:
Main material: water-proof Oxford
Lining: polyester
Handle: synthetic leather
Size: 30x15x45cm/11.8x5.9x17.7in (LxTxW)
Capacity: 20L
Carry way: handbag/backpack
Structure: 1 center zipper pocket, 1 wall zip pocket, 1 front pocket, 1 mobile phone slot, 1 card slot

Note: There may be 1-3cm error as measuring methods varies.

Package included:
1x Backpack

• Built-in 2 in 1 external ports for charging and headset, allow you listening to music while charging your phone or other devices.
• Large capacity(20L), fits for laptop within 15.6in, you can hold books, folding umbrella, laptops, etc at one time.
• Made of spill-resistant Oxford,lightweight but wear-resistant.
• Ergonomic widen thicken non-slip breathable shoulder straps with bartack reinforced design to relieve pressure of shoulder.
• Breathable mesh back design, with honeycomb mesh elastic foam cushion to promote air circulation and heat dissipation.

Built-in 2 in 1 external ports for charging and headset, allow you listening to music while charging your phone or other devices.Koolertron