The green sparrow is composed of 92.5% mulberry silk and 7.5% spandex. The mulberry silk is the silk spewed out during the third metamorphosis of the silkworm into a pupal. The surface is smooth and shiny. Old people in China say that the mulberry silk is traditional Chinese medicine. It has the effects of beautification and detoxification, and is called natural fiber. Our studio will not sell products unless we really like it.