I gave all my other exercise gym socks away to the Salvation Army store after I discovered these. They are far more substantial than any other running socks I've had.

(update) I have recently bought a couple more pair a couple of years later. There is less "content" in the socks now than there used to be. You can easily see the difference visually. The current ones are less "plush" and look smaller in the same size. Still OK, but no longer a standout.