Pain Reliever
I purchased this duo over a year ago and have to say it has never let me down. My lower back at times is so bad I can barely walk. Stretching with these(I purchased the firm) has helped me a lot. I followed the little guide that came with it and all I can say is - try it. If it works to save pain for you the way it has for me, you will not be sorry. I suffer from some disc degeneration and sciatica pain .