Welcome to Japanese knot bags. I made these. Made from%100 acrylic yarn. Machine wash in laundry bag and hang to dry. Here is a little historical fact about these bags origin. While the exact origins of the Japanese knot bag are not well-documented, it is believed to have a long history deeply rooted in Japanese culture. Historically, Azuma bukuro bags were made from traditional fabrics, often using kimono fabric scraps or other textiles. let me know which color you want in comments when ordering