Versatile mounting system fits virtually All trunk-mounted or stand-alone racks. Universal strap mounting system designed for easy attachment to trunk or separately mounted luggage racks. One end features a zip-off backpack, while the other has a 2" expansion panel. Fully rigid construction makes bag look great even when empty. Big, easy-open top for quick packing. Four exterior zippered pockets. Top carry handle plus shoulder straps included for ease of carrying. Constructed of UV-, water- and weather-resistant 1,2-denier saddle tuff and durable saddle Hyde panels. Weather-resistant rain cover also included. Dimensions: 24" w x 11.5" H x 12" D; measures 3,3 cubic inches.