AMERICAN and EFIRD Rayon Super Strength Thread Solid Colors. Premium twisted rayon embroidery thread is made with brilliant colors and has a silky lustrous appearance. Soft smooth feel. Made from high tenacity rayon to give the thread a higher sheen than polyester. This package contains one spool with 1100 yards of rayon super strength thread in solid colors. Comes in a variety of colors. Each sold separately. Imported.