Diagram of a human cell that contains microplastic threads

Why IXNAY Avoids All Synthetic Fibers, Including Polyester—Recycled or Not

A plain-language field report from someone trying to reduce microplastics in their own wardrobe—without pretending I’m perfect.

TL;DR

Synthetic fibers are plastic-based textiles (polyester, nylon, acrylic, and many blends).
These materials can shed tiny plastic microfibers during wear and washing.
“Recycled” may reduce some impacts compared to virgin plastic, but it doesn’t stop shedding, it doesn’t biodegrade, and it doesn’t solve end-of-life waste.

A quick note from me

I’m not writing this from a perfect closet. Mine still contains synthetics. This post is me figuring it out in public: what’s true, what’s marketing, and what I’m changing.

The simple truth the tags don’t lead with

Recycled synthetic fibers are still synthetic fibers.
They are still plastic-based materials. And plastic fabrics can shed tiny fibers over time.

So when a brand says “sustainable recycled polyester” (or nylon, or acrylic, or a “performance blend”), I don’t think that’s the whole story. It’s usually the most flattering part of the story. And it's absolutely not sustainable.

What shedding means (no jargon)

Synthetic fabrics can release tiny strands called microfibers—a type of microplastic—during:

washing
drying
friction and wear (pilling, fuzzing, abrasion)

Those fibers can enter wastewater and the environment. Treatment plants can catch some, but not all. And even captured fibers still become waste that has to go somewhere.

This is why I don’t see shedding as a side issue. It’s THE issue.

Where microplastics show up

Microplastics have been found in water, soil, and air—and in living organisms. Research has also reported microplastics in human tissues, including reproductive tissue and semen.

Science is still working out the exact long-term health impacts at real-life exposure levels. But “plastic in living systems” is not something I want to normalize.

And yes, the dark joke practically writes itself:

Someday kids won’t just diagram cells with nucleus, DNA, mitochondria, and cytoplasm.
They’ll be labeling: “microplastics: present” and circling the stain:
“polyester fiber dyed in D350 Flame Scarlet.”

Not funny. Except it kind of is. Until it isn’t.

Potential ramifications (what might be at stake)

We should be honest about uncertainty—but also honest about what’s worrying:

irritation and inflammation in tissues
cell stress (your body reacting at a tiny scale)
plastics carrying additives and other chemicals
possible reproductive concerns (still being studied, but the location matters)
unknown long-term effects

Why “recycled” doesn’t automatically mean “sustainable”

If something is truly sustainable, it needs to make sense across its whole life:

1) Production
Recycling can reduce some impacts compared to virgin plastic. That part is real.
But it still keeps us locked into plastic-based material systems.

2) Use phase (the part many brands skip)
The product can shed microplastics throughout its normal life.

3) End of life
Synthetic fibers don’t biodegrade. They break into smaller plastic pieces. And most clothing is not recycled back into new clothing at meaningful scale.

So yes—recycled plastic can be “less bad” than virgin plastic.
But less bad isn’t the same thing as sustainable. (The Lesser of Evils, anyone?)

What I’m doing about it (practical, not perfect)

Here’s the direction I’m moving:

buy less
wear what I already own longer (repair > replace)
shift new purchases toward non-plastic fibers whenever possible (cotton, linen, hemp, wool)
keep synthetics only where they truly earn their keep (some outerwear/technical needs), and buy fewer/better (but, damn, I REALLY wish I could avoid them altogether!)
reduce shedding from synthetics I already own: wash less, wash cold/gentle, avoid high heat, minimize friction

This isn’t purity. It’s direction.

IXNAY Materials Policy (where we stand)

For all of the products found on IXNAY.COM: we’re trying to stay entirely away from synthetic fibers that shed microplastics (polyester/nylon/acrylic and blends), even when marketed as “recycled” or “eco.”

Our priorities:

non-plastic fibers whenever possible
long wear life (durability beats disposable “eco” claims)
clear labeling (no vague sustainability language)

If synthetics are somehow unavoidable (so far we have not found a good USA-based Print-On-Demand supplier that carries organic hoodies with zero polyester, recycled or not):

fewer pieces, higher quality, longer life
honest language (we will never call it “sustainable” just because it’s recycled)
care guidance to reduce shedding