I was looking for an open-slide type slipper because my feet sweat easily, even when the rest of me is cold.  I also wear a size 10.5-11, and often even the "XL" fitted styles are too tight.  Problem solved!  Not only are these super comfortable (plus wide enough), but I later realized after reading the care instructions on the soles that I can toss them in the washer!  I am ordering another pair today.