Domesticated silk moths cannot live without human control.The larvae eat mulberry and produce silk to make pupae cocoons. They are historically economically important insects which produce natural fiber silk. Adults silk moths are covered with white hair all over their bodies they cannot fly, and live for about 10 days without the need of food.*This patch was made using Japan engineered special metallic embroidery yarns, to try and get closer to nature's magnificent colors.■ProductSize / 5cm×5cmMaterial / Embroidery thread: 100% RayonMade in JapanThis patch Stick-on and Iron-on too.■AttentionCommercial use of this product is strictly prohibited.〈How to iron on this patch〉※The patches can be ironed on cotton and polyester materials, be careful of heat-sensitive materials.※Take care of hot iron burns.How to use patches→https://en.kyototo.jp/ja/pages/how-to-use-the-patches