The Dirt Skirt hangs from your frame and knocks down dirt, mud, slush and gravel to keep your vehicle and tows cleaner. Skirts can easily be removed when not towing. Filaments are permanentlly matted into a steel casing. Extruded polypropylene skirt filaments are tough and long wearing. Includes two 4-foot lengths of skirting plus aluminum mounting channel and hardware.