Mettle transfix 100Percent nylon thread is used for sewing almost anything that requires strength and durability. It is strong, easy to use, and a great choice for sewing fabric, leather, canvas, and vinyl. This invisible nylon thread eliminates the need to color match thread to fabric. Use for general sewing or quilting when you don't want the thread to show. 1094yd clear- invisible nylon thread eliminates the need to color match thread to fabric. Use for general sewing or quilting when you don't want the thread to show.