I heard about Thorlo socks from a friend so decided to try them. They are fantastic! Very comfortable and warm and wick moisture away from my feet. The best thing is they don't bunch up when I'm wearing my boots all day. They are a bit toasty in hot weather but the comfort is worth it to me. I have size 11 feet and bought size 13-15 socks - I'm too lazy to wash them separately, they shrunk in the first wash and now fit perfectly!!