This is just what I wanted.  I bought these only to wear indoors.  Perfect slippers for indoor use, and great to walk out to a deck/yard.  Clearly people are having no trouble wearing these outdoors (although I don't know why you would buy these to wear outside...).  It's soft and comfortable.
It runs small, so size up.  I usually wear 7-7.5 and bought 7.5-8.  Too small.  I sized up, bought 8-9 and it fits me just right.