The material is unknown. It appears to be in very good condition, and I believe it has never been worn. The han-eri (collar) is also very clean. It was stored in a chest of drawers in a clean tatoushi (wrapping paper). - Color: White - Material: Sheer fabric - Design: Nagajuban (undershirt for kimono) - Features: Lightweight and breathable Thank you for viewing. This came from my grandmother's chest of drawers, who passed away about 20 years ago. I believe it was made around the Heisei era or the late Showa era. There may be a storage odor. As old fabrics can sometimes deteriorate, I have checked by pulling and rubbing in various places to confirm that it doesn't tear. (I don't think this one is that old though...) I often use recycled materials for shipping. I have a cat. I try to be careful, but sometimes cat hair may get attached (><).