Isn't recycled polyester better because it uses less new plastic?

It can mean fewer freshly-made petrochemicals go into the fibre in the first place — that part is real. But most 'recycled polyester' comes from plastic bottles, not old clothes, which pulls bottles out of bottle-to-bottle recycling loops. And once it's a garment, recycled polyester does not behave like a lower-impact fabric: a commissioned lab study found it sheds more microfibres on washing than virgin polyester, not fewer.

Does this mean virgin polyester is the better option?

No — the study's own conclusion is the opposite: the fix isn't swapping one kind of polyester for another, it's using less synthetic fibre overall. Both shed plastic that doesn't biodegrade.

Is all recycled polyester the same?

No, and that's part of the problem: the same research found some garments marketed online as recycled whose physical care labels didn't confirm it. A 'recycled' claim on a product page isn't something you can verify yourself without the garment in hand.

Sustainability · Beginner

Is recycled polyester actually better than virgin polyester?

Recycled polyester is marketed as fashion's fix for plastic. A lab study of major-brand garments found it sheds more microplastic, not less. Here's what the research actually shows.

15 December 2025 · 5 min

Close-up of natural fabric fibres and texture, lit by soft daylight.

Recycled polyester shows up on a lot of hang-tags now, usually next to a leaf icon and a line about plastic bottles. The implication is simple: buying this garment is the responsible version of buying a polyester garment. The research doesn’t back that up.

What the label actually means

“Recycled polyester” almost always means the fibre was made from recycled PET plastic bottles — not from old clothes. That’s a real, if narrow, benefit: it uses fewer freshly-made petrochemicals to make the fibre. It is also, structurally, still polyester: a synthetic, petroleum-based polymer. Recycling it doesn’t change what it’s made of or how it behaves once it’s a garment on your back.

What a recent lab study actually found

In December 2025, the Changing Markets Foundation published lab results from testing a batch of garments — a mix of cotton, virgin polyester and recycled polyester — bought from five major global fashion brands. The testing, carried out by a university microplastics research group, measured how many fibres each garment shed when washed.

The result ran against the marketing: recycled polyester released roughly 55 percent more microfibres on average than virgin polyester, and the fibres it shed were smaller — which makes them travel further and penetrate deeper into tissue once released. Recycling the plastic didn’t make the fabric shed less; by this measure, it shed more.

Why would recycling make it shed more?

The study doesn’t fully resolve this, but points to how the recycled fibre itself is made: breaking down and re-spinning PET can leave the resulting fibre more brittle and prone to fragmenting under the mechanical stress of a wash cycle. The headline point stands regardless of the exact mechanism — “recycled” describes where the raw material came from, not how durable or low-shedding the finished fibre is.

The part that matters more than the percentage

The study’s own conclusion isn’t “avoid recycled, buy virgin instead.” It’s closer to the opposite: optimising which kind of polyester you buy can’t fix a problem that comes from the fibre type itself. No amount of better weaving, tighter yarns or washing-machine filters fully stops a plastic fibre from shedding plastic. The fix the researchers point to is using less synthetic fibre overall — not picking the better-marketed synthetic.

What this means when you’re actually shopping

A “made from recycled bottles” claim tells you about the fibre’s origin, not its environmental performance once it’s clothing.
It is not evidence the garment sheds less microplastic — the opposite was measured, at least in this study.
The same research found some garments described as “recycled” online whose physical care labels did not confirm it — so the claim on a product page and the label sewn into the garment can disagree.
None of this makes a polyester garment unwearable. It does mean the “recycled equals responsible” shortcut doesn’t hold up, and a fibre choice is worth checking on its own terms rather than taking the hang-tag’s word for it.

That’s the whole point of checking the fibre, not the marketing copy: some claims hold up, and some don’t survive contact with the actual study.

Common questions

Isn't recycled polyester better because it uses less new plastic?: It can mean fewer freshly-made petrochemicals go into the fibre in the first place — that part is real. But most 'recycled polyester' comes from plastic bottles, not old clothes, which pulls bottles out of bottle-to-bottle recycling loops. And once it's a garment, recycled polyester does not behave like a lower-impact fabric: a commissioned lab study found it sheds more microfibres on washing than virgin polyester, not fewer.
Does this mean virgin polyester is the better option?: No — the study's own conclusion is the opposite: the fix isn't swapping one kind of polyester for another, it's using less synthetic fibre overall. Both shed plastic that doesn't biodegrade.
Is all recycled polyester the same?: No, and that's part of the problem: the same research found some garments marketed online as recycled whose physical care labels didn't confirm it. A 'recycled' claim on a product page isn't something you can verify yourself without the garment in hand.

Now you know what to look for.