Best Buy For Your Buck: Get more than 3 TIMES the thread for less than HALF the cost of a 250 yd. spool. Add Pizazz to every project where you are going to see thread on top! 40 Wt. Poly Deco™ embroidery thread is a top quality 100% polyester embroidery thread. It 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.