Sewing thread Poly Sheen, tearproof and shiny, ideal for embroidery. Robust, decorative and colorfast: with Poly Sheen you are buying the embroidery hero among Mettler’s sewing threads. The shiny sewing thread is not only wonderful to embroider with but can also be used universally thanks to its extra strong and abrasion resistant properties. These properties are particularly important on heavily strained textiles such as sports and leisure wear, denim, terry cloth, children's, leather and work wear. Colorful decorative seams work also very well with the decorative sewing thread.