I believe this is a single layer of genuine silk. I can't say for sure as there's no label. The width is about 23cm, and the length is about 310cm. I'm not sure of the exact type of obi, so I'm listing it as is. Please make your own judgment. There are no noticeable stains. I brushed it and vacuumed it with a Dyson to remove fine dust, and then steamed it with an iron. This is a high-quality obi with a glossy thread. Great for remaking! Please read the profile before purchasing. Woven obi with red stripes and geometric patterns. - Color: Red - Design: Stripes and patterns - Material: Woven fabric - Pattern: Geometric Thank you for looking.