Thank you for viewing this product. This is a polyester collar lining made of Toray Sil look. Please use it as the lining for the collar when tailoring a single-layered kimono or a summer kimono (Ro). Unlike silk collar linings, polyester collar linings do not yellow easily and remain pure white for many years. Silk collar linings will inevitably yellow over time, but polyester collar linings are less prone to yellowing. #kimono #kimono #tailoring #wasai (Japanese tailoring) #otayoshi (tailoring) #collarlining #collarlining #collarlining #Sil look #Toray