These are thick, plush socks that give you that extra warmth you're looking for.  I wear them all the time around the house, in bed, and especially with boots.  I rarely take them off.  No other socks compare.

Now for the bad.  After a very few washings they pill up like crazy and I've already worn holes in the toes.  My socks are only about 4 months old.  I bought 7 pair and I'm rotating them so they don't wear out too quickly.

Even with the pilling and the holes I wouldn't be without them, they're THAT warm and soft.