My wife and I now each own our own B Mat Impact. Linda had hers first and after using it for a month in Boot Camp Classes she sold me on the comfort, support and stability of this product. I was concerned it might move around on the floor as we moved but this has not been the case. Linda still uses hers with runners on but I am now barefoot and am really enjoying the comfort. If any mat can make BC classes more enjoyable, I am in! Highly recommended for anyone who takes care of their equipment and body …. oh, we are 68 and 70 years young!!