I am a woman with very wide size 10-10.5 feet (FYI- if you don't know the size to get, the Balega website has a very accurate size chart. I am a medium). I have NEVER been able to wear low cut socks without having them slip down into my shoe after walking just a few feet. I've spent more $$ than I care to say on socks, trying to find the ones that cause the least friction, have the most comfort, and don't slip. I have found my holy grail in these socks. They didn't slip down even a little bit on my mile and a half walk. I just got these, so I haven't put them through the wash yet, and am not sure if they will stretch or wear out (although, many reviews on here say they do not wear out in the wash).The ONLY thing I wish these socks had was a label for L and R, so that I don't stretch the socks out putting them on different feet each time.
All in all, perfect socks. I just bought 4 more pair!