I think maybe they just didn't have the 9th anniversary in stock. I had planned on buying the last pair of them on black friday. What they sent was the black x white, instead of sumi ink over indigo x white. First it is dipped in indigo then dipped in sumi ink. The weft is bleached white thread. Nearly a year later someone pointed out that I had been wearing black with no indigo whatsoever. I had already been a part of the indigo invitational for 11mos. Just coasting for the last couple of weeks.