I have chronic Plantar Fasciitis and am a nanny working 11+ hours a day on a stone floor.  The family I work for doesn't allow shoes in the house so I have to have dedicated house shoes or slippers.  With these extreme conditions, I have found relief using orthotics in these slippers.  They have a very nice insole with moderate arch support, but my chronic problem doesn't allow me to use them.  Fortunately, this slipper has removable insoles and my orthotics fit right in.  The slipper is VERY comfortable, the adjustable tab is great, and the sole is VERY thick and absorbs shock better than my athletic shoes!  The fit is roomy, but adjustable.  Perfect!