Black ankle socks are all the same, right ?  Not in this case.  I've had several different brands the past few years, but never saw the problem these socks display.  The black yarn detaches in little clumps from the inside of the sock, so when you take the socks off, black pieces of yarn wind up on the floor, carpeting, and everywhere. I tried washing the socks, inside out, several times and it didn't help much.  Will not buy these again.  I replaced them with a Champion version from Amazon and they are fine.