PET is the group called Polyethylene terephthalate, thermoplastic polymer resin of the polyester family found in synthetic fibres. Levi’s made jeans out of recycled plastic bottles in 2013
Synthetic fibres are a term used on human-made treads. Chemicals combined into large molecules called polymers produce fibres like nylon, polyester, spandex, acrylic, modacrylic, olefin, saran, spandex, and vinyl.
The textile substrate is a term used to describe a substance which upon an enzyme reacts (surface treatments). In other words, compounds that undergo reactions with enzymes. Included are different colourants dyes, natural sizing and thickener materials, such as starches and cellulose derivatives, etc.
Trevira is a branded type of Polyester, produced by Hoechst Fibres Inc. It offers better to pull performance than regular Polyester.