The Mancro backpack is water-resistant, made out of a durable polyester nylon, and holds all laptops under 17 inches. It's also great for commuters; the bag has a built-in USB port on its side that can be connected to a power bank. Leave the power bank inside the bag and plug your phone into side USB port for easier access. There are 12 pockets in total—three large, nine smaller, and two sealed side pockets. The bag comes with a combination lock to keep your belongings and papers safe. Plus it looks very cool. $30.