Metallic thread with silky luster, high tensile strength, and exceptional colorfastness. 2 ply, 40 weight. 60% vicose rayon, 40% metallic polyester. 200 meters per spool. It is strong enough to use on soft furnishings, for decorative seams, and all other kinds of sewing and quilting, as well as being soft enough to add sparkle to your most elegant evening wear.