Don't know what you use now but Id suggest decent 800-1000 gram thinsulate hunting boots. Then my wife uses these little heat pads that stick on the bottom of her socks....they stay warm for up to eight hours. We just got back from elk hunting in temps from minus 8 to 25 above. Her feet didn't get cold at all.
Last edited by skb2706; 01-11-2013 at 08:28 AM.