Anti-theft design, the hidden zipper and invisible pockets located on the back keep your laptop and other valuables safe and handy, in the meantime offers a private space. Made from water-resistant and wear-resistant polyester fabric. The bag is equipped with a USB cable that connects the internal power bank via USB port and USB cable, you can easily and conveniently charge your phone, tablet and other devices without opening up the backpack. Mesh back pads and shoulder straps provide comfort and breathability. • Type: anti-theft backpack • Materials: polyester • Laptop size: 15.6” • Volume: 36L • Color: black