I haven't used it much, so as the photos show, there's nothing particularly concerning, and I personally think it's in beautiful condition. I purchased it online from FRANK Kurasuno Doguten. [What is Kurashiki Knotting?] It is a chair mat woven at the vertical loom and research institute devised by Yoshinosuke Tonomura. Cotton thread is stretched for the warp, and bundles of wool or cotton thread are tied (knotted) on. It is durable and can be used for a long time, and it is also beautiful as interior decoration, so it is very popular. [Differences between Cotton and Wool] ・Dye: Cotton: Natural dyes such as indigo dye, bengala, and persimmon tannin dye. Wool: Chemical dyes. ・Aging: Cotton: With long use, the surface of the indigo part will gradually change color to a greenish hue. Wool: Color change is slower and less than cotton. ・Color transfer to clothing: Neither cotton nor wool will transfer color. [Size] Approximately 43cm in length and width, approximately 3cm thick.