The deeply pocketed 16.5” wide driver seat sits you at the ideal cruising angle. The 12.5” wide passenger seat utilizes Mustang’s unique internal steel support wings. On the styles without the driver’s backrest, the driver’s back is well supported by the nose of the passenger seat that extends forward to create a full 8” backrest. The built-in driver backrest offers more features than any other backrest on the market.