Nerdy science factoid of the day:

-40 is where Centigrade and Farenheit are cross. That is they are the same temp.

I've lived where it gets that cold, and I'd be worried about frostbite on the face. I miss good, honest cold - but that's a rant for another day.

Toe or foot-covers? Wear shoes that are a size or two large and several pair of socks? (I'm serious here) A plastic bag over each shoe to keep down wind infiltration? You'd make fashion model of the year with that!