As soon as it arrived, I ripped open the box and put it straight away in my office chair. I suffer from chronic coccyx pain. Ahhhh! Relief! I don’t have words for how this instantly relieved much of my pain. The cut out of the cushion is perfect to relieve the tender area. It fits perfectly in my office chair. Worth every penny just for the last hour of sitting in comfort. I was worried about that my legs would be uncomfortable since the edge of the cushion doesn’t taper. After sitting on it, I don’t think that will be an issue. One side is a soft fabric. The bottom is grippy to help it stay in place (have included a pic). I plan to also take it with me when I travel by car as that is the most painful sitting for me. It fits well in my car so I’m very happy for that. I may order another one so I don’t have to take the cushion with me all the time. The only adjustment is that I sit up a couple inches higher and had to lower my desk chair and car seat a little. ..More