The Top 10 Grooviest Poly Deco's around! Just think of all the fun you could have with this colorful assortment! 40 Wt. Poly Deco Embroidery Thread is Sulky's top quality, lower priced, trilobal polyester thread and is shiny, strong and colorfast. It is perfect for appliqué and embroidery on work clothes, children's clothing, sports clothes, or any garment that will be bleached or washed frequently.