If you are one of the many Oil-Head RT, RS, and S riders who like to switch between the narrow CITY Cases and standard size SYSTEM Cases, or if you just swap lids between the two styles, then you'll be excited about this new Kathy's product. These convertible bag liners have a zippered gusset around the center. With the gusset closed they're a perfect fit for the City Cases. Then, with just one easy zip around the bag, they expand to full size for System Cases. So, whether you're set up for commuting and short hops, or out for the long haul, one set of bag liners does it all! Features include zippered inside pockets and external pouches that fit the inside recesses at the back of each saddlebag.