The Flak Pack XL backpack by Oakley is a medium sized backpack with just about every feature you could ask for. First off, your laptop stows in a dedicated panel that's accessible from the exterior. There are two expansion pockets and a zip pocket on the outside, plus a holster on the shoulder strap to hang your eyewear. Pull the zips for the main chamber and you'll have access to two mesh pockets, a wide pocket for books and mags, and a special pocket for your media player with a pass-through for your headphone cable. Unzip the secondary chamber to get into a separate storage space that includes four more mesh pockets. Wherever the universe throws you next, you'll have everything you need to make the most of it. The measurements are: 19 x 14 x 5.5 inches.