I started wearing socks to bed as I found they helped me sleep. But, part way through the night I'd wake up and my feet would be too warm. I bought the bamboo socks to try. They keep my feet warm, but not too warm. I'm definitely happy with these socks.
These are comfortable, nice and light. I use them for work socks (I work in an office).
A little large - I am a ladies 9 1/2 - these are a little long - Very comfortable - Wash well - not a lot of shrinkage. I will order the M size next time and see if they fit better. Regardless, love them.