When traveling, the removable packing cube helps organize your items and optimize packing space. The main compartment can be accessed through the wide roll top opening or the side zipper, which comes in handy when you need to access items further down in the bag. The backpack has a padded laptop sleeve with SafeEdge construction for a 15" MacBook Pro® or 15.6" PC. The smaller compartment also has small pockets for electronics and a PowerPocket making it easier to charge your phone or tablet on the go.