Superfeet sells their "Red Hot" inserts which are designed to help insulate your foot from the ground without adding much additional thickness. If you are using plastics (mountaineering boots) the "Intuition Denali" liners are warmer and about 1/2lb lighter than the booties that come in most mountaineering boots. They are heat formed for a perfect fit. As Alex pointed out, circulation is essential. When heat molding the liner they put a cup around your toes to insure that you have plenty of room to wiggle the little guys. In the past, I've put an additional wool insulating layer below the wool inserts of my Sorels. I've found that insulating myself from the ground really helps my feet stay warm when sitting around the fire on a cold night. Man, I want to go winter camping now!  |