The Shureido catalogue describes the KB10 Black uniform as a superior heavy weight Gi designed from high quality 100% cotton.
Some commonly asked questions about Shureido uniforms:
Q What weight is SHUREIDO Gis?
A Shureido Gis are made from a special Japanese No. 10 material and does not come with an oz. designation. Ounce designation is for regular Duck Canvas, therefore giving an oz. designation to Shureido Gis will not to it justice.
Q Does Shureido K-10 mean its 10oz.?
A No, Shureido K 10 is No. 10 Japanese Cotton Canvas specifically made for Karate Gis.
Q My KB-10 (Black) Gi streaked when I washed it, Is this normal?
A Yes this is normal. Streaking will occur where the gi is wrinkled and rubs against the washing machine.
Shureido customers like the marbleized look and it does fade to a gray.
This is not a defect.