Polyester is plastic. Spun from petroleum, the same raw material as fuel and packaging. It is in 60 percent of the clothing made today, and almost all of the activewear sold to women. The industry did not choose it because it performs better. They chose it because it costs less. Polyester is cheap to produce, cheap to dye, cheap to ship in volume. The margins are extraordinary. A pair of leggings that costs three dollars to make sells for one hundred and twenty. So they built a language around i