From Everything.Sucks

On March 20, 2009, the Federal Trade Commission (FTC) introduced a new fiber for carpet. They named it triexta, and it is similar to polyester. Triexta had found its way into the marketplace with Mohawk’s SmartStrand fiber, which is made from DuPont’s Sorona polymer. Shell had first introduced this fiber in 1995 and called it Corterra, but closed its plant in March 2009. Corterra had a very small market share. Polyester is often referred to by its acronym “PET” (polyethylene terephthalate) and triexta by “PTT” (polytrimethylene terephthalate).

A customer said this in a review, "I am not sure if it was that trexia stuff friday. realtor claimed it was indiscructable and bleach proof. and never needs soap. It was barely 980 s.f and took 6 hours to clean the crap with all the stains, oil build-up, traffic lanes. I finally got fed up wasting chems. so I got out the greased lightneing and sprayed the traffic areas. rinsed then bonneted and it finally came clean. Not unethical since I hit it with everything with no results."