This 2006 Stratoliner has a tall removeable upright backrest. The upright is part of a 3-piece quick release system providing an easy on-easy off solution for passenger comfort. The 3 pieces are the upright or sissy bar and two side arms. The upright is secured with a lock on the left side. Both side arms have release levers at the tail end. To remove, unlock the upright and press the levers at the tail end of the side arms for a backrest free bike. Add a backrest pad of your choice and you have a complete setup.