It is a 2 / 1R triplex denim material that uses C9 for warp and C16 for weft.
The material is an image of vintage work wear, and the fabric using gray for weft yarn is an image of Gelt Denim, which looks like Sugawara TEX and is a material finished with a little beautiful eyes.
It is a material that can be used for coveralls, painter pants and jackets.