The fashion industry needed a sustainability story. Recycled polyester was convenient. “Made from plastic bottles” is a good headline. It's short, it's visual, it implies circularity. Brands adopted it fast, consumers responded well, and the category grew.
There's a problem. The science on recycled polyester has been accumulating for two years, and it doesn't support the marketing.
What recycled polyester actually is
Recycled polyester, often labeled rPET, is made by breaking down post-consumer plastic — typically bottles, packaging, or other synthetic textiles — and re-extruding it into fiber. The process requires significant heat and chemical treatment. The resulting material is chemically identical to virgin polyester: a petroleum-derived synthetic that sheds microplastics, doesn't biodegrade, and sits against skin releasing the same compounds as the plastic it came from.
The argument for it has always been that it diverts plastic from landfill. That argument doesn't hold up when the end product sheds microplastics into the water supply and eventually becomes textile waste itself.
The recycled polyester problem is worse, not better
In December 2025, the Changing Markets Foundation published a study examining microplastic shedding from recycled versus virgin polyester garments. The results were not what the sustainable fashion narrative needed.
Recycled polyester garments released approximately 55% more microplastic particles during a single laundry cycle than their virgin polyester equivalents. The fibers shed from recycled materials were also around 20% smaller in diameter — which matters because smaller particles penetrate biological barriers more easily. Particles under roughly 20 micrometers can be absorbed through the intestinal wall. Nanoplastics can cross into living cells.
A separate 2024 study published in PubMed found BPA levels almost twice as high in recycled textiles compared to conventional polyester — 13.5 ng/g versus 7.7 ng/g. BPA is an endocrine disruptor. The recycling process, which involves high heat and contaminated feedstock, concentrates chemical additives rather than eliminating them.
So recycled polyester sheds more microplastics, sheds smaller ones, and contains higher concentrations of harmful chemicals than the virgin material it replaced. That is not a sustainability upgrade.
The demand problem
The situation has a further irony. Demand for “recycled” synthetic fabrics has outpaced genuine supply. Reports have surfaced of factories re-processing perfectly usable virgin polyester in order to sell it as recycled — greenwashing compounded by fraud.
Consumers choosing recycled polyester activewear because they want to make a responsible choice are, in many cases, buying something measurably worse for both their health and the environment, produced under conditions they cannot verify.
What actually solves the problem
The microplastic problem in textiles has one genuine solution: natural fibers. Organic cotton, Tencel lyocell, merino wool, linen — materials derived from plants and animals that biodegrade, don't shed synthetic particles, and don't carry petroleum-based chemical additives.
The performance activewear industry built its identity on synthetics because natural fibers were assumed to underperform. That assumption deserves more scrutiny than it gets. Tencel lyocell manages moisture comparably to synthetic alternatives. Merino regulates temperature and resists odor without any chemical treatment. Organic cotton at the right weight and construction performs across a range of training disciplines.
BENCHED doesn't use polyester. Recycled or otherwise. The reason isn't complicated: natural fibers don't shed plastic into the ocean or into you.