Kasane-eri (Layered Collar) Outer Fabric: 100% Silk Core: Cotton, Rayon, Polyester, Other 《How to Use》 Insert the 3 special pins attached to the collar into the seam at the center back of the kimono collar to secure. The position of the pins can be adjusted to your liking. Will sell to those who understand simple packaging and home storage. Price negotiations are not accepted m(_ _)m No comments, instant purchase OK!