Poly™ is our 100% polyester thread that is manufactured in Germany and is designed specifically for high-speed, commercial embroidery and monogramming machines. It is very pliable, making it easy to work with. Though it has a beautiful, silky sheen, it can withstand chlorine bleaching and harsh, industrial laundering. This 40 weight thread is available in 300 dynamic colors. Select colors are available in PolyFIRE™ (Fire-Retardant polyester thread) and Poly60™ (60 weight polyester thread).