I have very narrow heels, so my socks slip down, as my heel on right foot slips almost completely out the back end of the right one (I'm guessing my left foot is still swollen a bit from a problem I'm currently having with Hallux Rigidus - yet, this is a great shoe for Hallux Limitus or Rigidus.  Am awaiting my new orthotics, to see if they fit inside to give my left foot better arch support, as I had my arch tendon replaced 5 years ago after it was worn away from Arthritis.