How to Spot Greenwashing in "Sustainable" Activewear Labels

"Sustainable." "Eco-conscious." "Made responsibly." Activewear brands print these words on hang tags with no explanation of what they actually mean, because in most countries, they don't have to. There's no legal definition, no independent check, no penalty for using them loosely.

That means you can't tell a genuinely low-impact product from a marketing exercise just by reading the label. You have to know what to look for. Here's how.

What greenwashing actually is

Greenwashing is when a brand implies environmental or ethical credentials it hasn't earned, usually through vague language, selective disclosure or imagery, rather than verified evidence. It's rarely an outright lie. More often it's a true but small claim, like "made with recycled materials" when that's 5% of the garment, presented in a way that feels like a much bigger commitment than it is.

Buzzwords that mean nothing on their own

These words show up on almost every activewear label. None of them are regulated, verified, or backed by a legal definition:

• Eco-friendly
• Sustainable
• Conscious / conscious collection
• Planet-friendly / kind to the planet
• Responsibly made
• Guilt-free
• Going green

None of these are necessarily false. They're just unverifiable on their own. If a claim isn't backed by a number, a certification, or a named standard, treat it as marketing copy, not information.

Red flags worth checking for

• Vague percentages. "Made with recycled materials" without saying how much. Could be 100%, could be 5%.
• Self-issued labels. A green leaf icon or an in-house "eco" badge the brand designed itself isn't a certification. Real certifications come from an independent third party, not the brand's own marketing team.
• One green product, one green story. A single "conscious edit" or capsule collection sitting inside a catalogue of otherwise conventional synthetic activewear.
• Offsetting instead of reducing. Carbon offset claims with no disclosure of what's being offset or how it was calculated.
• Recycled polyester marketed as the finish line. Recycled polyester is still plastic. It still sheds microplastic fibres every time it's washed. Lower impact than virgin plastic, yes. Solved problem, no.
• No mention of the supply chain. A brand that talks at length about fabric but says nothing about factories, labour conditions or dyeing processes is telling you half the story on purpose.

Certifications that actually mean something

Unlike marketing language, these come from independent third parties with published standards. A brand can't just print them, it has to be audited to earn them:

• GOTS (Global Organic Textile Standard). Covers the entire supply chain from organic fibre to finished product, including chemical use and labour conditions. The most rigorous organic textile certification available.
• OEKO-TEX Standard 100. Tests the finished garment for harmful chemical substances. It doesn't certify farming or labour, only that the fabric you're wearing is free from a defined list of harmful chemicals.
• bluesign. Focuses on the manufacturing process itself, reviewing chemicals and inputs before production even starts, to limit hazardous substances and protect worker safety.
• Responsible Wool Standard (RWS). Certifies that wool came from farms meeting defined animal welfare and land management standards.
• Global Recycled Standard (GRS). Verifies both the actual recycled content of a product and that the supply chain meets social and environmental requirements, not just a marketing claim of "recycled."
• Fair Trade Certified / B Corp. Broader accountability standards covering labour, wages and overall business practices, not fabric-specific but a useful signal of general transparency.

One certification isn't proof a brand has it all figured out. But a brand with zero third-party certifications and a label full of buzzwords is telling you something too.

The "recycled polyester" problem

Recycled polyester gets used as shorthand for "sustainable" more than almost any other material. It's a genuine improvement over virgin plastic, since it uses less energy and diverts existing plastic from landfill or the ocean.

What it doesn't do is stop shedding microplastics. Polyester, recycled or not, is plastic spun into thread, and every wash releases microscopic fibres into the water system. We've gone deeper on this in our post on how synthetic clothing contributes to ocean microplastic pollution, and on how polyester stacks up against wool across dry time, odour and end of life in merino wool vs polyester shorts. The only fabrics that don't shed plastic are the ones with no plastic in them: wool, cotton, linen, hemp.

So when a brand's entire sustainability pitch rests on "made from recycled ocean plastic," it's worth asking the obvious question: what happens when you wash it?

A 30 second checklist before you buy

• Does the claim include a specific number (a percentage, a certification, a named standard)?
• Can you find the certification's name and look it up independently?
• Does the brand disclose where and how the product is made, not just what it's made from?
• Is the "green" claim about the whole product, or one line in a bigger catalogue of synthetic gear?
  
• Would the claim still sound impressive if it used plain language instead of marketing language?

If most of these come back unclear, the claim is doing more work for the brand's marketing than for the environment.

FAQs

Is "sustainable" a regulated term in clothing?

No. In most markets, including Australia, there's no legal definition of "sustainable," "eco-friendly" or "conscious" for clothing labels. Brands can use these words freely with no independent verification required.

What's the difference between OEKO-TEX and GOTS?

OEKO-TEX Standard 100 tests the finished garment for harmful chemical substances. GOTS certifies the entire supply chain, from organic fibre sourcing through to labour standards. A product can carry one, both, or neither.

bluesign focuses on the manufacturing process itself, reviewing chemicals and inputs before production even starts, to limit hazardous substances and protect worker safety.

Sources

• Global Organic Textile Standard (GOTS): certification criteria and scope
• OEKO-TEX: Standard 100 testing criteria
• bluesign: Input Stream Management and manufacturing standards
• Textile Exchange: Responsible Wool Standard and Global Recycled Standard
• Australian Competition and Consumer Commission (ACCC): guidance on environmental claims

Most "sustainable" activewear claims are vague on purpose. Ours isn't. See the MARINE|O Merino Wool Walkshort →