Fleece lined so it feels like your arches are supported and are wider moccasin than Minnetonka, and extremely comfortable.  Also better looking since they don't have the contrast of dark stitching. I'm going to order another color since I'm wearing them all the time.  My only concern is my feet will be too hot when it warms up (right now they are the only slipper keep my toes warm).  Expensive but love them!