These are lush, warm, and comfortable. Nice the way the "flaps" turn up for greater ankle warmth. There is one major flaw, however: there's no sidewall to the bootie. The strip of leather that runs around the slipper above the sole is soft and gives no support to keep the foot over the sole. Consequently, with a little wear the whole slipper loosens up and it is more like wearing a sock; half the time your foot is sliding off the sole to one side or the other. Frustrating. I am retiring the pair I bought and have replaced them with a similar slipper by Eddie Bauer that does provide enough support to keep your foot on the sole. A huge improvement. The quality of the Acorns is high; one would hope they improve the design and then they will deserve 5 stars.