These are very heavy wool socks, they are very warm, I think I will get a better warmth with them if I got bigger boots.  My boots are tight with these socks, so I'm actually thinking about getting a bigger boot... more room, more air, more cozy warmth.
These socks seem to be very well made, and they don't slip down.  I will update when I get the bigger boots and try them out again.  Thanks ~