Features:Versatile mounting system fits virtually all trunk-mounted or stand-alone racksUniversal strap mounting system designed for easy attachment to trunk or separately mounted luggage racksOne end features a zip-off backpack, while the other has a 2" expansion panelFully rigid construction makes bag look great even when emptyBig, easy-open top for quick packingFour exterior zippered pocketsTop carry handle plus shoulder straps included for ease of carryingConstructed of UV-, water- and weather-resistant 1,200-denier SaddleTuff™ and durable SaddleHyde™ panelsWeather-resistant rain cover also includedDimensions: 24" W x 11.5" H x 12" D; measures 3300 cubic inches