Hi @retirement75, I bought one for my computer chair but now use it on my elliptical recumbent bike. I've been thinking about getting another one as it did seem to help, especially with tailbone pain. -- https://www.amazon.com/gp/product/B072KFT9M3/.

I may try a different though since I've looked at a few others. Here's a review of some of them - The 7 Best Seat Cushions for Lower Back Pain of 2023: https://www.verywellhealth.com/best-seat-cushions-for-lower-back-pain-4589726