• Breathable and adjustable shoulder straps relieve the stress of shoulder.
• Dimensions: 12.6 x 6.3 x 18.1 inches / 32 x 16 x 46 cm (L*W*H)
• Fabric: high quality and comfortable canvas
• Large Capacity- Allows you to hold your daily supplies like laptop, smartphone, wallet, power bank and books, etc
• With built in USB charger outside and built in charging cable inside,just connect to your own power bank, then it offers you a more convenient way to charge your phone while walking. Please noted that this backpack doesn't have power itself, usb charging port only offers an easy access to charge.