Bought these because the Blitzen Crocs are unavailable.  Thought that they would be a fine substitute.  However, the heel cup is from hell.  It's not firm enough to stay up on its own when putting on the Croc.  As you put your foot in it goes right beneath your heel and you have to dig to get it back up.  Of course, the alternative would be to hold it up while you're putting the Croc on ... but who wants to do that?!  It's a clog!  You buy these for how easy they are to 'slip' on.  These will be going back.