The material is silk. This is a stylish and fashionable obi with a calm atmosphere. It is clean with no noticeable stains. It is reversible and can be enjoyed on both sides. Size: 9.5 x 380 cm Hakata obi is easy to tie and does not easily come undone due to the silk sliding. Please understand that this is stored at home. I am also selling other items. Please take a look here. #EmiKakuobi