So, I was at Linda Ice 9 and the temps were around -35C and my toes were very cold in my leather Scarpa Matterhorns and we had to beg off the climb. I don't want that to happen again so I have been looking for plastic boots on-line. There seems to be a very limited selection available at most retail outlets and that made me wonder... are plastics out these days? Are there other warm options (to -35C) that I should be considering?