I wore them 4 times a week and they performed flawlessly, even during the crazy temperature swings (-7 to 55). My feet usually sweat more than normal when I wear thick socks and Gortex boots, even in extremely cold climates. For whatever reason, I didn't have that issue at all. And my feet never smelled horrible at the end of the day! Again, I can't thank you enough…They were a life saver.