RDL's (GW size S4) hi quality vinyl, custom fit for "rider / solo" start @ $580; leather custom fit for "rider / solo" $780 == if you want custom fit for wife or G/F, the price goes up. Back rest for rider, passenger &/or heat are all extra...… I'm sure Mustang's seats are also hi quality vinyl....RDL does not have "seat pans" or "one size fits all" seats. You have to send them a seat & they'll make it to fit your butt......your butt will be happy & smiling. They're called "day Long" for a good reason.