Think Tank Airport Check In, Deluxe Shoulder Briefcase with Backpack Shoulder Harness, Fits 15" - 17" Notebooks. Fits 15" - 17" laptops: This briefcase will hold up to 17" laptops. If you have a smaller laptop, there is a vertical divider that can be positioned so that extra space is created for your AC adaptor or other accessories. The padding can also be removed, if desired Fits easily under airline seats: This photo shows how the briefcase fits under a seat, even with one of those electrical boxes left of the briefcase. For more leg room, after takeoff put the briefcase against the front of the seat and directly under your legs Slides onto roller handles: There is a pocket on the back with a zipper at the bottom that allows the briefcase to slide over the handle of a roller. This is a very useful feature when traveling through airports Lock on bottom of roller pocket: When you are using it as a regular pocket for books, newspapers and other items, you can secure them with the hook and loop "lock" at the bottom of the pocket, thus preventing anything from accidentally falling out Incredible front organizer: The bag features three zippered pockets for securing valuables or smaller items, as well as pockets for cell phones, calculators, sunglasses, business cards, CD's or DVD's, as well as pens and pencils