Does your posture start to slump a little by the end of the day?
Is your chair or car seat not agreeing with your back?
Are you in and out of the car/truck, constantly twisting and turning?
Do you spend long periods behind the wheel whether commuting or driving for a living?
These cheap simple products could be the answer you have been looking for.
I have the first one, the mesh lumbar support ($!0 at Autobarn) in all our cars as well as our office chairs and have even used it on the couch. Highly recommend it.