I have a history of lower back problems and my coccyx suffers when sitting for any length of time. At work, the chairs are not the best for comfort.
It would get that after 1/2 to 1 hour of sitting, when I went to get up, I would experience sharp, severe pain in the coccyx area...something that I had to just push through. No way around it.
One of my friends had a similar problem several years ago and went to a medical supply company here in town and picked up a wheelchair pad. Turns out that a lot of the city bus drivers purchased them for use while driving.
I ordered one last fall and am very glad that I did so. In the chair at work, I can go over 2 hours without a problem. In my 2007 F150, my bladder has prevented me from seeing how long I can go.
The cushion is made with a dry polymer, so that if it gets punctured, there is no liquid leaking out. These are made for wheelchair patients who can use their feet to move about, so are not that thick. In the chair or truck seat, it does not change heights and angles all that much.
Action Centurion 5200-2That price is about as good as it gets. You may be able to find a little lower, but can definitely find it for a higher price.
I did not order from that company, but another in North Carolina that I did not see when I did my search. The price there was $92 including slow shipping.
Good luck and happy sitting.