Fully Drown Yarn(FDY): its is produced by a process similar to POY manufacturing except that the yarn is produced at higher spinning speeds coupled with intermediate drawing integrated in the process itself .this allows stabilization through orientation and crystallization. FDY is mainly used as weft or warp in making fabrics. FDY Polyester yarn is used for industrial applications requiring uniformity and consistent tenacity, elongation, and shrinkage. Most binder yarns, industrial sewing threads, and hose reinforcements are produced from FYD polyester.