What to put on or inside winter-SPD-boots to keep toes warm? Where I live we have very cold winds blowing in from Russia's Siberia. It is freezing despite the fact that I have all kinds of extra winter clothing like commando balaclava, SPD winter shoes, ESS goggles -- but my toes are still freezing. 

So what would you suggest I wear to keep my toes warm?
MEC advise, on their web site, that the cheapest way to keep your shoes dry is a plastic bag.

They also sell shoe covers: some for rain and some (with neoprene and microfleece) for winter.