Recycled Polyester (rPET)

It's polyester fibre made from existing PET plastic — usually old drink bottles, which are cleaned, shredded, melted, and spun into thread. Chemically it ends up essentially the same material as virgin polyester. The "recycled" part describes the source, not the substance: once it's a fleece or a t-shirt, your skin and your washing machine can't tell the difference.

Two reasons. Environmentally, it avoids new petroleum extraction and gives bottles a second life, with meaningfully lower energy and emissions than virgin polyester. Commercially, "recycled" sells — it lets brands offer a sustainability story at low cost. Both reasons are real; the environmental benefit is genuine even when the marketing leans on it heavily.

"Recycled polyester," "rPET," "recycled PET," or a percentage like "made with 70% recycled polyester." Branded versions include Repreve. Certifications like the Global Recycled Standard (GRS) sometimes appear and add credibility to the recycled-content claim. If a label just says "polyester," assume virgin.

Anywhere ordinary polyester lives, increasingly: activewear, fleece jackets, swimwear, school uniforms, soft toys, backpacks, tote bags, cushions, throws, and bedding fill. Outdoor and athletic brands have adopted it fastest, so newer sports and outdoor gear is quite likely to contain some recycled content.

Identically to virgin polyester: skin contact while wearing it, microfibres shed into indoor dust and washing-machine wastewater, and whatever finishing chemicals were applied — water repellents, wrinkle-resistant treatments, antimicrobials. There's also a trace-level antimony angle: antimony is used as a catalyst in PET production and carries through recycling, though what reaches you from fabric appears very small.

Treat it as polyester. The fibre itself is low concern; the questions route through finishes (PFAS water repellents, formaldehyde-releasing anti-wrinkle treatments) and through microfibres, which remain an active research area. The recycled origin doesn't add a pregnancy-specific concern, and the antimony traces in fabric are far below the levels studied for health effects. Washing new items before wear removes some finishing residue.

Same picture as virgin polyester: the finish chemistry matters more than the fibre, and tight synthetic activewear worn for long periods can trap heat, which has a small, studied association with sperm quality at chronic high temperatures. Nothing about the recycled origin changes this either way.

As with polyester: kids' fleece and uniforms shed microfibres into the home, and crawlers spend more time in the dust where fibres settle. rPET soft toys and kids' fleece are common — fine for outer layers, but natural fibres are the calmer choice for sleepwear and bedding. Check that children's items carry OEKO-TEX or similar certification if you want extra reassurance on finishing chemicals.

No specific evidence either way. Skin sensitivity varies more between individuals than between age groups, and nothing about recycled content changes that.

Three solid findings. First, rPET's environmental benefit over virgin polyester is well supported — lower energy, emissions, and petroleum use. Second, microfibre shedding is comparable between recycled and virgin polyester; recycling doesn't fix the shedding problem. Third, antimony is present in PET and rPET as catalyst residue; migration studies focus mainly on bottles and heat, with fabric transfer to skin considered minimal. Human-health evidence on inhaled microfibres remains the open question for both versions.

Low for the fibre, same as polyester — and it's worth being fair here: rPET is not riskier than virgin polyester, and environmentally it's better. The household concerns are the polyester concerns: microfibres in dust and wastewater, plus chemical finishes on treated items. The antimony question is genuinely minor for clothing. "Recycled" shouldn't earn a halo, but it doesn't deserve suspicion either.

For next-to-skin and overnight items — sleepwear, bedding, underwear, kids' basics — cotton, linen, wool, and hemp sidestep both microfibres and finishes. Where a synthetic is genuinely the right tool (swimwear, activewear, fleece outer layers), rPET is a reasonable pick, ideally OEKO-TEX certified and free of stain or water-repellent treatments you don't need. Wool is the underrated fleece alternative: warm, washable, no plastic shedding.

The same as polyester: hard to avoid entirely, easy to manage. You don't need to avoid rPET specifically — the practical task is deciding where synthetics make sense at all, then handling the laundry side. A microfibre filter or filter bag, cooler and fuller wash loads, and natural fibres for bedding and sleepwear cover most of it without much ongoing effort.

Next time a label says "recycled polyester," read it as "polyester" first and "recycled" second. Make the decision on whether polyester suits the item — then let the recycled content be the tiebreaker in its favour, not the reason to buy.

Recycled polyester is a planet question and a household question, and the answers differ. For the planet: genuinely better than virgin polyester. For your home: identical — same microfibres, same finishes, same laundry habits needed. So buy rPET over virgin when polyester is right for the job, keep natural fibres for beds and sleepwear, and run synthetic loads through a fibre filter. That's the whole, honest position.

Textile Exchange's reports on recycled fibres, academic reviews of microfibre shedding (PMC), antimony migration studies on PET, and the Global Recycled Standard for what certifications actually verify. See References below.