Atelier Hiron Kimono Fabric Reform The comfortable feel of 100% silk Tsumugi fabric is so pleasant that you'll want to wear it every day. This is a thick, firm Tsumugi. Thank you for viewing. To wash, simply hand wash with a neutral detergent, lightly wring, and hang to dry in the shade. Iron lightly while still slightly damp. No need for dry cleaning, these are great clothes that you can wear fashionably and cherish for a long time.