I believe this is silk紬 (tsumugi), but I'm not certain. It's a sturdy fabric, like that used for a rain coat. The blue parts appear iridescent depending on the light. There are what look like weaving flaws and faint stains, but they are hidden. Those who like Meisen might like this d(^-^) Yuki (裄 - shoulder to wrist): 61 cm Sleeve Length (袖丈): 59.5 cm Miyake (身丈 - length): 93 cm I will include a string (紐) m(_ _)m(*^^*)