! have had arthoscipic knee surgery for arthritis in both knees. it was so bad I coldn't walk to the back of a large store. When I got the DMX max shoes, it changed my life. I can walk anywhere with no pain for 30-40 minutes. I really believe they made it possible for me to work 2 more years before I retired. When I meet someone who has knee problems, I insist they try mine on, and several people have bought them. . Thanks Reebok!