I have a pair of boot blankets. If I'm going to be on stand for hours in really cold temps I use them. Once I get in my stand, I put them on over my boots and then open up a hand warmer pack and place it over my toes before zipping up the boot blanket. It works for me.

Ron

People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf.
Orwell