The FLAT CAP FRONT is designed to be attached to, and finish, the exposed front surface of any module. The FLAT CAP FRONT is 13.5" x 10.5". The FLAT CAP FRONT module offers two flat pockets on the outside, and one flat half-height slip pocket on the inner surface of the module. The primary outer pocket is accessed from the top and has a cover flap that is secured with Velcro. This where you'll likely store your iPad (as long as it's not in a thick case), or a manilla folder or two for some documents, or a magazine. There is a second flat half-height panel on the outside surface of the first one, that has a zipper across the very bottom. If the zipper is closed then this half-height panel acts like a pocket. If the zipper is open then the opening at the bottom allows the telescoping tubes of a suitcase or folding cart to pass through and the panel serves to secure your bag. There is also a flat half-height slip pocket on the inner surface of the module. It has a cover flap secured with a spot of Velcro. Here you can stow an important document or two, or any small flat item that you'd like to keep out of harm's way. NOTE: The FLAT CAP FRONT is one-directional (as are ALL of the FLEX System modules). It is always front-facing. That means that it can only be zipped onto the FRONT SURFACE of any module. The idea is that if someone wanted to, they could put a FLAT CAP onto both the front AND the rear of a configuration, thus giving a nice slim look to the bag.