Madeira Polyneon 40 - Polyester Machine Embroidery Thread Madeira's polyester embroidery thread, Polyneon, is constructed of a specially developed raw material which eliminates looping, puckering and virtually all thread breaks. Suitable for almost any application, Polyneon's unique formula makes this embroidery thread extremely durable and smooth running. Vibrant colors which are silky and luxurious as well as resistant to chlorine bleach make Madeira Polyneon the ideal thread for embroidering on uniforms, safety garments, and commercial linens.