Polyester belongs to the group of chemical fibres of synthetic origin (more information in the article about chemical fibres) and is the most used chemical fibre worldwide (60%).

The first heat-resistant polyester fibre came onto the market in the 1940s.

Polyester is produced through the polyester-condensation procedure. Fossil oil is obtained from monomers which connect through this process to become polymers. Then, this material gets melted and pressed through a nozzle which produces an infinite thread (filament fibre). During this procedure the fibre can also be stretched at the same time which produces a thinner and longer thread.

Polyester can be extracted out of recycled PET bottles. In Germany 40% of all Pet bottles are processed into fibres each year (Industrievereinigung Chemiefaser e. V.).

Properties of polyester:
- Resistant to acids and lye
- Tear resistant when dry and wet
- Very elastic
- Hardly crinkles
- Very resistant to light
- Bad moisture absorption (polyamide absorbs more)
- Dries quickly
- Good or bad insulation depending on production process
- Soft
- Breathable
- Electrostatic
- Skin-friendly
- Highest heat resistance of all synthetic fibres (good for creases and pleats)

Abbreviation on care tag: PES