Despite its small size, the suit jacket chest pocket is the most important pocket in your entire ensemble, no matter how many snaps and zippers you may have hidden elsewhere. Yet tragically, it can never reach its maximum potential on its own. It needs the yin to its yang, the peanut butter to its jelly, the Captain to its Tennille. This pocket square completes the picture, and elevates your outfit from the so-so to the main event. The difference is in the details, and this detail makes the difference.