This expandable shoulder bag is made to carry any and all of your things. By simply unzipping the surrounding zipper, you can actually double the size of this bag. With one waterproof zippered pocket on the flap, an open pocket on the back, and one zippered pocket underneath the flap you can easily access items on the go. The main compartment includes a padded sleeve for a laptop computer, up to 15". There is additional space for laptop accessories, books, papers and much more.