Polyester lining.
Zipper closure.
Expandable Large Capacity: Compressed capacity of 22L, full-expansion zipper creates 60% percent more packing space, capacity up to 35L, total three layers. The first compartment can store your phone, passport or other small items etc. The second compartment can store clothes and daily supplies. The third compartment is a laptop compartment, which can store a 15.6 inch laptop as well as 14 inch and 13 inch Laptop.
USB Charging Port Design: The usb backpack comes with a charging port you can link your phone to and easily charge during outdoors and travel. Place your power bank inside the bag and connect your phone to the outer port ( built-in charging cable inside ). Please note that this travel bag doesn't power itself, usb charging port only provides easy access to charge.
Comfy and Breathable: Tech backpack with back U shaped three-dimensional ventilation design helps with air convection, ventilation and heat elimination. Wide breathable mesh shoulder straps with plentiful sponge pads help relieve the stress from your shoulder. At the same time, the luggage strap on the back can help secure the backpack to the suitcase, which will make your journey easier.
Water Resistant Backpack: The computer backpack is made of Oxford fabric with high density polyester lining, which has good waterproof performance, protects your belongings from splashing water and rain, is perfect for business traveling, weekend getaways, shopping, going to school, professional office work and other outdoor activities.
