Futatabi6.5 Sumi Ai 908 Crosby Coverall DistressedSumi Ai is our naturally dyed black denim, created by layering sumi ink over a base of indigo. The combination of these two natural dyes brings a deep, complex shadow to the fabric. Even after countless washes, the elegant tone remainsan enduring quality that defines indigo denim. The fabric features a bold, prominent weave with a firm structure and resilient texture. It is slowly woven on vintage shuttle looms from the 1950s, a process that enhances