I know what compression socks are and why one would need them after surgery, but I think the word 'rotations' is being used incorrectly. I certainly can't work out what is meant by the word 'rotations' here, unless it means that you are to rotate (make circles in the air with your feet, which is a common foot exercise after surgery), in which case it could read: ...for the foot rotation exercises I need to do after surgery. Perhaps you are not giving enough context here?