This Backpack has a padded compartment designed to provide added protection of notebooks with screens up to 15.5inches. The middle compartment has a smooth fabric lining to slip notebooks (up to 9 inches thick) in and out with ease. The front accessories pocket has 8 special pockets for your cell phone; thumb drives; pens/pencils; and portable music device. It also has handy removable key clip that snaps on and off so you never lose your keys; or have difficult time finding them. In addition to the 3 main compartments in this pack there are also 2 front panel external pockets; 2 holster pockets and 2 mesh holster pockets (Great for water bottles!). The back wall has Opti-Aire padding that along with Super-Aire channels will let your back breath. Our 3+ inch wide padded adjustable shoulder straps are also equipped with Opti-Aire fabric on the panels touching your body; but also have a stretch section for give and take comfort when you are on the go. The bottom is durable PVC Dot pattern.