DURABLE MATERIAL & WATER REPELLENT:The laptop backpack made of water resistant and durable polyester fabric.Ensure a secure & long-lasting usage everyday.

LARGE CAPACITY:①Large capacity travel backpack with many pockets great for business travel, weekend camping.The 1st Layer for storing your small items( For tissue/key/earphone).The 2nd Layer for books,phones, wallets and other daily necessities.The 3rd Layer for storing clothes, umbrellas or other things. The 4th Layer for Laptop,Macbook max to 15.6 Inch as well as 9.7 inch notebook.②SIZE:18.9x12.2x6.7inch (23L).This backpack’s size can be expanded to 18.9x12.2x10inch (40L).

SHOULDER PRESSURE REDUCE DESIDN:①Ergonomic s-shaped padded shoulder strap and fully 3D ventilation padded back,which make your shoulder stress released and protect your back and shoulder effectively even when full loaded..②The straps can be adjusted to various heights of people and help relieve shoulder stress via transfer.③A top handle and a side handle provide ergonomic comfort and travel convenience.The luggage strap on the back is a great design to attach to your luggage securely.

EXTERNAL USB CHARGING PORT:This water resistant backpack with built in USB charger outside and built in charging cable inside,enable to charge your phone without opening the large backpack while traveling or walking.Please note that the power bank are not included in the package.