What “Low-Tox” Activewear Actually Means (And What It Doesn’t)

What “Low-Tox” Activewear Actually Means (And What It Doesn’t)

A simple guide to separate facts from myths with all the claims on your activewear — including the ones we can’t make about our own.

There’s a conversation happening right now about what’s in our clothes, and most of it isn’t very helpful.

Scroll for five minutes and you’ll find confident warnings about synthetic fabrics, vague reassurances about natural ones, and a lot of words — clean, non-toxic, chemical-free — that sound meaningful but aren’t regulated by anyone. It leaves most people with a feeling of low-grade worry and no idea what to actually do about it.

We make activewear from certified synthetic fabrics, so we have an obvious interest in this conversation. That’s exactly why we want to be careful here: what follows includes the parts that don’t flatter us, and we’ll tell you plainly where the science isn’t settled.

Here’s what’s actually true.

Myth: Natural fabrics are automatically the low-tox choice

This is the most common assumption, and it’s the least reliable.

Conventionally grown cotton is one of the most pesticide-intensive crops in the world. And whether a fabric started as a plant or a polymer, what happens after it becomes a fabric matters enormously — dyes, softeners, wrinkle-resistant finishes, anti-odour treatments. A garment can be one hundred percent natural fibre and still carry a finishing process nobody has disclosed to you.

The useful shift: stop asking what the fabric is made of and start asking what was done to it, and who checked.

Myth: If it says “non-toxic,” someone has tested it

“Non-toxic.” “Clean.” “Chemical-free.” “Free from nasties.”

None of these terms are legally defined or independently verified. Any brand can print any of them on any garment, with no testing whatsoever, and face no consequence. They’re marketing language, not information.

The useful shift: ignore the adjectives entirely and look for a certification with a verifiable number attached. If a brand’s claim can’t be checked by a third party, it isn’t a claim — it’s a sentence.

Fact: Certification is the only claim you can actually verify

The most widely recognised standard for textile safety for human skin is OEKO-TEX® Standard 100. It’s worth understanding what it does and doesn’t do, because it’s frequently misrepresented in both directions.

What it tests: finished fabric — not just raw materials — against a defined list of harmful substances, including formaldehyde, heavy metals, phthalates and banned azo dyes. Limit values are stricter than most national safety regulations.

How it has changed: the list has grown from roughly 100 substances when it launched in 1992 to more than 1,000 today. As new research identifies new risks, the standard updates. It isn’t static.

The part most people don’t know: the certificate expires every twelve months. Products must be re-tested and re-certified annually against that year’s criteria, not the criteria in place when a brand first certified. A brand cannot certify once, then keep using the logo on everything it makes afterwards.

And it’s tiered. There are four product classes with different limit values. Class I — anything for babies and toddlers — carries the strictest limits of all, because that skin needs the most protection. Activewear fabrics usually sit in class 2 which is the next tier.

You can check any of it yourself. Every certificate has a number, searchable through the OEKO-TEX® Label Check tool. No login, no trust required. If a brand claims certification and can’t give you a number, that itself is the answer.

The part we can’t make sound good

Here’s where we’ll be straight with you, because you’ll hear this elsewhere and you should hear it from us first.

All synthetic fabric sheds microfibres in the wash. Ours included.

Recycled nylon is still nylon. ECONYL® and REPREVE® — the regenerated fibre we use, made from recovered fishing nets, recycled plastic bottles respectively — have a meaningfully lower environmental footprint at the point of production than virgin nylon. But it does not solve shedding. Neither does any recycled polyester. Any brand telling you their synthetic fabric doesn’t shed is telling you something that isn’t true.

There’s also a genuine, ongoing scientific conversation about whether chemical additives in synthetic microplastics can be absorbed through skin. Research published in 2024 using human skin models found measurable uptake of certain chemical additives, increased by sweat. That research is early, it’s contested, and we’re not going to overstate it in either direction. What we can tell you is that certification addresses exactly this category of concern: it tests for the chemical additives that would be the thing to worry about, not the fibres itself. This is where an OEKO-TEX® standard 100 certification becomes your north star when choosing a piece.

What we do about shedding: our 108 SPORTIF care guide has always recommended washing in a microfibre-capture bag — a guppy bag — which traps fibres before they reach the water system. It’s a small, unglamorous step. It’s also the honest one.

Myth: Being sustainable means buying more sustainable things

The lowest-impact garment in the world is the one you already own, worn for a decade.

Certification, recycled inputs and small production runs all matter. But none of them matter as much as longevity — a piece that holds its shape past one season, that you’re still reaching for in three years, that never needed replacing at all. That’s why we make pieces in small batches and why we’d rather you bought one piece you keep than four you don’t.

Buy less. Buy better. It’s not a slogan we invented; it’s just the maths.

How to evaluate any brand — including ours

Four questions that cut through nearly all of the noise:

1.     Is there a certification, and can you see the number? Named certification with a verifiable number, or it doesn’t count. Ours is 2311281.

2.     Are they specific about the material, or vague? “ECONYL® regenerated nylon” is a fact. “Eco-friendly fabric” is a mood.

3.     Do they acknowledge any limitations at all? A brand with nothing unflattering to say about its own product is selling, not informing.

4.     Will it last? Ask about the fabric weight, the construction, the wash guidance. Longevity is the sustainability metric that actually compounds.

Why we wrote this

We could have written a post about why our fabric is wonderful. This is more useful, and frankly it’s a better test of whether you should trust us.

We’re a small Australian label making activewear in considered runs from certified fabric. Every 108 SPORTIF fabric is OEKO-TEX® Standard 100 certified, and you can verify that yourself rather than take our word for it. We use ECONYL® regenerated nylon and REPREVE® recycled fabric. And we tell you to use a guppy bag, because our fabric sheds like everyone else’s does.

If that combination of specificity and honesty is what you’re looking for, we’d love to have you. And if you take these four questions and use them on a different brand entirely — genuinely, good. That’s a better outcome than most of what’s being posted about this right now.

108 SPORTIF is a conscious luxury activewear label based in Australia.