Believe it or not, the best "cozy socks" I've found were the ones I got when I was in the hospital for surgery last year ---- and I am NOT a sock person when I'm in the house!!! I love these socks, though!! They are the softest things I've ever felt, they come up past the ankles, don't bind, are fuzzy, and have the grips on the bottom.
I have no idea what brand they are or I would buy a bunch more. I'm going in for surgery again early next year and I'll try to find out!