Gütermann extra strong sewing thread in dark gray color with a 30 m spool made of 100% polyester is a suitable thread for machine sewing with the possibility of using all stitches. Gütermann universal sewing threads are characterized by high strength, but still flexibility, they do not fray or tear. These threads are not susceptible to rotting and sweat absorption. Extra strong sewing thread is suitable for decorative stitching of solid materials.