My current Zymax strings of about 150pcs are of 4 colors. Only the red has Ashaway USA, the other 3 colors show Ashaway USA Zymax 62 or Ashaway USA Zymax 67. Ashaway has responded to my first inquiry by saying all the 4 colors are of the same design and process and expressed surprise at my findings. However, I have subsequently queried them on whether they have ever changed their Zymax design, core structure, jacket type and any changes in pigmentation. I have yet to hear from them on this followup. If they respond saying that there has been no change ever made, then we know something is wrong, because we all know (even stringers know) the reds are an entirely different string.