Review on Ultimate Performance and Comfort: Smartwool PhD Outdoor Light Micro Sock by Doug Hinrichsen

A large number of 5-star reviews. You will love these socks. I've been using and abusing them for over a month now and they still look pretty good (see photo). They are very comfortable for my morning bike rides to school with my kid. Also great for walking/running. Because they are wool I can wear them for days without washing and they don't smell. They are very tight. Not so thin that your feet get cold in the cold, but not hot on a warm day either. If you're looking for more padding you can try something heavier than "light", but for me this is the perfect weight in every way.