@12251948 you can buy a vive inflatable tailbone cushion on amazon if getting the tuberosities off the chair helps. You can conveniently carry it in a grocery store bag (I bought some black poly bags on amazon) so it looks like any carryon bag. The vive is adjustable since it is inflatable. I used to use that when my pain was worse. I had several posts above where I described what I did that helped me over time to get rid of /lessen my sit pain.