Two sideline certification considerations to keep in mind.
(a) seat upholstery comes with flammability requirements.
(b) for seats designed to modern standards, there are some dynamic seat test considerations. These are the reason that modern aircraft seats are so uncomfortable as the spine load criteria dictate rather firm upholstery.
Probably not in the forefront of your thought processes for the case of a back concern but, nonetheless, folks should be aware.
Me, I routinely took the sheepskin from my car seat when flying. Made for increased comfort on any sector length.