Any notes not attributed to other authors are mine. It will keep you warm even when it's pouring rain. Don't just wear a cloak at night . If your persona would've worn a cloak, put an extra pair of sweats on underneath your pants, or layer your tunic with an extra wool one. My persona uses a type of coat, anbd I found that a linen-lined silk coat over a single layer of wool works really well.
Long underwear is lovely, as is an extra shawl under the cloak.
Wear a couple of layers of socks, and keep your feet dry. And a hand muff is nice to keep your fingers from stiffening into icicles. Surface area ratios and stuff. Wool is good. If you can't stand wool socks, invest in some angora socks.