External USB Design: Comes with external USB port built-in charging cable, which is convenient for you to charge your electronic device anywhere. The headphone jack makes it convenient to enjoy music. (* Power bank and phone charging cable is not included.) Superior Material: High-quality canvas with complete lining, load-bearing but lightweight. Padded and adjustable shoulder straps make this canvas backpack comfortable to wear and protect your back when carrying heavy stuff. Roomy Space: Several compartments and dedicated pockets help you carry a laptop(15.6inch), books, tablet/kindle/iPad, glasses, cell phone and many other school suppliers while keeping you organized. Comprehensive Use: Our canvas backpack suitable for daily use, such as business traveling, working, camping hiking, college school, weekend getaways, shopping and other outdoor activities. NOTE 1. The product size is measured manually, and there will be a 2mm error due to factors such as different measurement tools and measurement methods. 2. This product is all taken in kind, but due to differences in photography, lighting, color deviation, and personal understanding of color. As a result, there may be some color difference between the actual product and the photo, and the color is subject to the actual product.