Anyone tried experimenting with trail runners with SealSkinz and heavy Smartwool socks in the 15F to -10F range? I can imagine saving a TON of weight here while keeping your feet just warm if not more than standard winter boots.
http://www.sealskinz.com/UK/socks/ke691-thin-ankle-length-sock.html
If you have waterproof/breathable sock do you need a waterproof boot in the snow?

