Polyester is a man-made fiber consisting of polymer. It has an extremely wide variety of uses ranging from clothing to plastic bottles.

Its production is similar to polyamide, and there are two key methods used. One is to melt down polyester polymer chips and extrude long, continuous filaments from the resulting substance, ready for processing into fibers. The other production method is to form polymer into fibers by way of a continuous process (CP) without first producing polymer chips.

Increasingly, polyester is manufactured using recycled PET plastic. PET plastic is used in some types of waste food packaging and soft drink and water bottles.