Unfortunately, Cayenne pepper causes sweating - but there are other herbs that encourage circulation... hmmm may have to do some research

I use my downhill ski neoprene over warmers on my cross country / light touring boots, and that does help. I've also been known to use the lil' hotties for toes heaters (snowmobiling.)

How about we keep the snow and send the -40F your way instead? Right now it is too cold to enjoy the beautiful snow.