This is a CristaSeya collarless jacket. The size is M, and I purchased it for around 150,000 yen at a select shop in Tokyo. It has a unique material and pattern, and a comfortable, relaxed fit. I was told that this particular pattern of collarless jacket was rare in domestic distribution. There is some nep (slub) characteristic of the material, but there are no stains or tears, and I believe it is in very good condition. I'm considering keeping it, so I may remove the listing. Please don't hesitate to buy it soon.