How cold do your winter hunts get? I have the same problem, and I went thru a ton of boots before I figured out a solution for me. My winter boots are ordered a full size bigger than normal so my blood flow isn't restricted. I wear a thin liner sock and then a light to medium weight smart wool (or similar) sock over that. If it gets really cold and I am sitting still I wear some pullover fleece (similar to icebreakers) and maybe a hand warmer in each. I can stay warm with Muck rubber boots with this system. Before, I tried sorrel PAC boots rated to -20 and my feet still froze in 20 degree weather. Good luck to you in your quest for warm feet!