These socks are fantastic. They are comfortable, supportive and they keep significant (in my case) amounts of moisture away from your feet while running.
Unfortunately they do have the incredibly frustrating habit of shrinking after one or two washes (despite my following the instructions). I have bought four pairs of these socks, only one pair has managed to retain its size! The other three pairs have shrunk to the degree that my feet will only just fit into them - uncomfortably.
I will probably not be buying these socks again, which is a shame - if they sorted out the shrinking problem I would be giving them five stars!