Yarn made out of Staple fiber is known as Spun Yarn, because the staple fibers should undergo number of process stages so that a yarn can be made out of them.

Made from manmade fibre like polyester, nylon and polypolene with the growing demand of gsynthetic(filament) fabrics due to ease in maintaining it there is a growing demand for polyester.polyester is extensively used and popularized in the market for its wide application.
Various varieties of the polyester filament yarn are available.