My biggest complain with my old slippers was that my feet would sweat and the slippers would not dry out. even when I took them off, took the inner soles out, and put them back on in the morning , they always felt cold and clammy. First let me say the inner soles are awesome. They are so super comfortable! And they fit like a glove. They are warm and cozy, and my feet NEVER feel like they are over heated and sweaty. The soles and uppers wick the moisture away from your feet and they stay dry as