Thanks, Ray, for your insightful comments.
I'm on the same page as to footwear on bare floors. I have not found a warm slipper to wear because I now wear a women's size 13N, and women's shoes/slippers, etc., are not made larger than a 10 or 11, and men's are usually too wide and floppy. Wearing socks simply isn't enough when it is below freezing out and my feet suffer. I finally found that TEVA does make women's/men's slippers in larger sizes, but not in narrow, and the box just arrived. Let's see if they are narrow enough for me to keep them on. . .