Wool socks could become your best friends! We went last December to the Arctic Coast, and a Russian friend insisted I take some, even if I had to borrow hers. They kept my feet nice and toasty.
I took several black skirts, several pairs of black tights, several white turtlenecks, and a couple of light cotton sweaters (along with the heaviest coat LL Bean makes and knee high boots). After I purchased my Russian hat, I blended in so well that people came up to me speaking Russian on the return trip.
Bon Voyage,
CindyC