Just like the reviews I read before I bought these tights, they were all I had hoped for and more. While my knee still required management in order to ski hard, I credit my ability to even be on the slopes to the assistance provided by the tights. Not only that, I did not have ANY soreness of calves or glutes or quads. Now I know this is not entirely because of the tights, and I had to be in reasonable shape for this to happen, but I have been in better shape when skiing in the past and had much soreness from using unfamiliar muscles. So....was it the tights? I certainly know I will not ski without them again!! Well worth the investment in my opinion!!