Mettler's Polysheen embroidery thread has all the advantages of rayon but is made of 100% trilobal 40wt polyester. It is gentle, soft, and shiny. Polysheen has better elongation and a 50% improvement in tensile strength, meaning a huge increase in stitch consistency. With the trilobal polyester, there is no thread breakage and it keeps its brilliance. Use this thread on all your embroidery projects.~