Michal Patten wrote a review of SmartWool PhD Running Ultra Light Micro Sock on August 24, 2010
I switched to hiking in trail running shoes a few years ago, but just started using light weight wool socks. What a big difference! These are great at moisture wicking and protect my feet from friction. I wear and 8 shoe and bought a M sock. It fits perfectly after 3 washings. The profile is low, but with my XT Wings they have enough coverage. I just ordered 3 more pairs!