The computer bag is made of high density and high quality Oxford fabric, which is waterproof, wear-resistant, tear resistant and can better protect the contents of the bag. External USB port design, anytime anywhere charging. Measuring 11.4'' x 16'' x 4.7'', the large main compartment with multiple pockets outside to hold everything you need. Breathable and adjustable shoulder straps relieve the stress of the shoulder. Foam padded top handle for a long time carry on. Please noted that this backpack does not power itself, usb charging port only offers an easy access to charge. Your price includes freight cost and a one color imprint on the front of the backpack. Pls order today !