I could (and do) wear these all day.  At first I was worried they would not be sized correctly, I wear a shoe size 7 and downloaded the Sorel size chart.  They said 8 so that is what I ordered and they fit fine.  As long as my foot fits in the slipper without crushing the back of the slipper and/or they don't flop when I walk, all is well.  The arch is great and my foot does not tire or ache.  I wear barefoot mostly but if I do wear socks with them, I wear thin socks so not to stretch the slipper.  They're starting to conform to  my feet now.  If you want a nice comfy relaxing slipper/shoe this is it.  I couldn't be happier.