I have been buying these for 20 years because I have found that the leather bottom grips the floor, prevents sliding and slipping, a safety feature.  I prefer these to slippers with no back (mules), because I like them TOTALLY on my feet, again for safety's sake.  I work at home and wear them all day.  Would give these 5 stars if there were more padding inside, but I love them as they are and will keep buying them.  They're pretty but not sexy or glamorous, but they keep me upright ;-).  Three months ago, was running in stocking feet (no slippers) on wood floor, and fell and broke my leg and wrist.  My fault -- If I had been wearing these slippers, this would _not_ have happened.  I usually buy 2 or 3 pairs at a time, replacing them every few years.  (Will post the same review for the black ones.)