Long blouse made of thin fabric like cotton lawn. I think it's better to think of it as a light jacket rather than a blouse. I bought it to protect against air conditioning, but I only wore it for about an hour on the Shinkansen once. It's a size S, but it has a relaxed fit, so it should be okay for a size M person as well. - Color: Black - Sleeve Length: Five-sleeve - Design: Buttoned, open front - Style: Relaxed silhouette - Back Design: Simple back style Thank you for looking.