These slipper boots are so comfortable.  The sole is super cushiony, and if you must wear them outside briefly, there is enough of a protective bottom, even in snow, to keep your feet comfortable and dry.  The height of the boot is perfect because it stays up to keep your calves' warm, and if you like, you can tighten them with the drawstrings.  One review said it was difficult to tell the left foot and right foot apart but I didn't have this problem.