100% cotton. Made by Hitoyoshi Shirts, a long-established shirt factory, the fabric and sewing have a very high-class feel. Four JUNKOSHIMADA shirts. They were stored in a chest of drawers, so the photos are wrinkled, but they are non-iron shirts, so the wrinkles will disappear after washing. I wore shirts 1-3 a few times, but they don't fit, so I'm selling them. The regular price is 6990 yen, so I think it's a great deal. The neck size is 39 cm, and the sleeve length is 82.86 cm. Please feel free to ask if you have any questions.