40 Cone Rayon Embroidery Thread Set - Set C Vivid Colors - 1000m Cones - Threadart 40 Cone High-sheen rayon thread set, no duplicates. Set C Vivid Colors. The classic thread choice for sewing beautiful decorative stitches and free motion machine embroidery. Rayon thread is light weight and has the same luster and natural finish as silk thread but it is stronger and less expensive. Color fast with regular washing and dry cleaning. We do not recommend using bleach or other whitening agents with rayon thread. 40 Cones, no duplicate colors. 40 weight/2 ply, Sealed in clear shrink wrap, 100% rayon fiber, 1000m mini king cones. Set C Vivid Colors