My wife bought these for me and I am one of those skeptics that don't believe in those stories about your foot having pressure points that help other parts of the body, but let me tell you something. This product is absolutely the 10th wonder of the world! I used to wake up and manage to struggle through a better part of my morning with back pain that was just so bad I would walk crooked. NOT ANYMORE! I'm telling you no more back pain and from the first day I put these in my boots the next morning! I got up and was standing straight with no pain! I can guarantee you I will have a pair of these in every shoe I wear for the rest of my life! IT’S SIMPLY AMAZING!