FS #20 is an elegant and soft metallic thread made from velvety spun rayon wrapped by an extra fine metallised foil. The blends of color are outstanding and voluminous. FS #20 threads are great for outlining and accent stitching in designs. It is exceptionally gentle to the skin and a wonderful compliment to fashion, children's wear, home decor and corporate wear. Madeira Metallic embroidery threads are Oeko-Tex® certified to be free from harmful substances.