I do all I can to keep my feet and hands warm. Down booties or dry boot liners and wool socks alone don't cut it for me. The charcoal/salt/ferrous chemical packs come as close as I can to having warm feet. I need to try a pad to rest my feet on when we are sitting around the kitchen. I even put some guaranteed to keep feet warm insoles in my down booties, helps for a bit. At least this last weekend, my feet stayed warm most of the time. My feet have always been that way. If I am snowmobiling, I can move enough to keep my feet warm even in my old Sorels.