Until I read one of the earlier reviews on this shoe, I had no idea that the my old Franco Sarto's were not leather. Wow.  So, the man-made material they are using is great and durable.  I had my earlier shoes for going on 3 years and I'm only replacing them because I've worn through and damaged both of the heels.  I have an average foot, a hair on the narrow side and the shoe fit me fine.  There is room for a sock, comfortable but not loose.  I'm looking forward to getting just as much wear out of these as I've gotten from their predecessor.