I have been trying different slippers out to help relieve my plantar fasciitis pain and this one is my favorite.  It fits tight to the foot, but comfortably so.  It has a nice sole with thick cushioning that allows me to walk without much pain. I have had no problem with slipping in them.  The only thing is the cushion effect does wear out fairly quickly, so I can see having to replace these every other month or so if dealing with plantar fasciitis when you need the cushioning, but just as a regular house slipper they should be fine. Easy to wash too.

*Update*
I liked these so much that I didn't want to be without them when washing them (because they have to air dry) so I ordered another pair (the white) and that pair fell apart within a week on the inner sole of both slippers.  So I am dropping them a star because there appears to be an inconsistency in quality.
*Second Update*
The first pair that I bought only last month has now started detaching from the sole and falling apart.  So it appears the sole on these Isotoner Clog slippers are of poor quality.