When it gets real cold, I wear these on my feet:
https://www.marks.com/en/windriver-m...color%5D=BLACK

right now, I'm just wearing shoe covers over my botranger ssr's - next cold day the wool socks are being broken out.

When it's cold, I don't have to worry about getting wet - I've got fenders on my winter bike right now, may come back off once winter really starts and I switch to studded tires.