While these were very comfortable for my dad's size 14 feet, he has drop foot and they easily slid off the backs of his heels a bit more than he was comfortable risking losing balance with, so he opted for a different slipper that had a full shoe grip. The bottom of the slipper grips well and the overall ease of sliding into and out of it is good. The comfort is really nice and it's good for around the house or yard. Probably even driving. For older men with walking difficulties - you should consider a more shoe like style. Meanwhile, my husband now gets to enjoy them with socks, as his feet are not as big (hahaha) as dad's.