"Eco-friendly." "Green." "Sustainable." Every activewear brand on the internet uses these words, and almost none of them have to prove it. Marketing teams know that a leaf icon and a line about "conscious materials" is usually enough to close the sale. It shouldn't be. If you care where your clothes come from — and what happens to them after you're done with them — here are five concrete signs that tell you whether a sustainability claim is real or just good copywriting.

1. They name specific third-party certifications — with numbers

A real sustainability claim is one you can verify. That means a named certification from an independent institute, usually with a certificate number you can look up.

The three worth knowing:

• OEKO-TEX Standard 100 — tests finished garments for more than 1,000 harmful substances. If a fabric has it, you know it's safe against your skin.
• GOTS (Global Organic Textile Standard) — covers organic fibres from field to finished product, including social criteria in the factories.
• Bluesign — looks at the full production chain: chemicals, water, energy, worker safety, emissions.

"Made from recycled materials" is a claim. "OEKO-TEX certified, certificate number 23.HSE.12345" is a fact. If a brand can't point you to the institute and the certificate, treat the claim as marketing. A good starting point for understanding what each label actually guarantees is our breakdown of OEKO-TEX, GOTS and Bluesign.

2. They tell you exactly what their anti-odour treatment is

Most activewear is treated to stop it smelling. How that's done matters a lot more than brands let on.

Vague language is a red flag: "odour-resistant technology," "freshness treatment," "stay-fresh finish." That phrasing almost always hides one of two things: silver nanoparticles or undisclosed biocides. Silver-based treatments wash out into wastewater over time, and there is now solid research showing aquatic toxicity from the resulting runoff. In 2026, with tightening EU chemical regulations, that's a meaningful red flag — not a detail to shrug at.

An honest brand names the technology. For example: HeiQ Mint, a plant-based treatment derived from peppermint oil, Bluesign approved. That's a statement you can research in five minutes. If you want the longer version of why this matters, we wrote about it in why gym clothes still smell after washing.

The rule is simple: ask "what specifically?" If the answer is a named ingredient or technology, you're probably in good hands. If it's another adjective, you're not.

3. They tell you exactly where it's made — not just "designed in"

"Designed in Copenhagen." "Designed in California." "Designed in Stockholm." These phrases are everywhere, and they are not transparency. They tell you where the logo was drawn. They tell you nothing about who sewed the garment, under what conditions, or with what environmental oversight.

Real manufacturing transparency looks like one of these:

• A named factory, with city and country.
• A named production region with verifiable certifications (e.g. a Bluesign or GOTS-certified facility in Portugal, Italy, or Turkey).
• An audited supply chain published on the brand's site.

EU manufacturing isn't automatically ethical, but it does come with enforceable environmental and labour regulations — REACH chemical rules, minimum-wage laws, union protections, working-hours directives. Uncertified factories in low-cost manufacturing regions may be excellent or may not be; the point is you have no way of knowing unless the brand tells you. A brand that won't name where a garment was made is asking you to take their word for it.

4. The fabrics have a traceable origin

"Recycled polyester" sounds like progress. It often isn't. Recycled polyester is a broad category — it can come from plastic bottles, from pre-consumer factory waste, or from blended feedstocks — and regardless of source, every wash still sheds microplastic fibres into waterways. Recycling addresses the input; it doesn't fix the end-of-use problem.

A traceable fibre looks different. TENCEL™ Lyocell, for example, is produced by Lenzing AG in Austria, from wood pulp sourced from FSC- and PEFC-certified forests, in a closed-loop solvent process that recovers more than 99% of the solvent. That is a supply chain you can follow from forest to fabric.

When evaluating a fabric claim, look for the brand of the fibre, not just its generic name. "Lyocell" is a fibre type; "TENCEL™ Lyocell" is a specific, audited product. "Nylon" is generic; "ECONYL®" is regenerated, with a published source stream. Branded fibres are traceable by design — that's the whole point.

5. They talk about washing — specifically

This is the test most people miss. Genuinely sustainable brands talk about how to care for the garment, because they understand that the use phase — washing, drying, replacing — is often the largest share of a garment's lifetime environmental impact.

What you're looking for:

• A recommendation to wash less often, not more.
• Low-temperature washing (30°C or below).
• Air-drying over tumble-drying.
• Guidance that acknowledges microfibre shedding.

If a brand only talks about the materials it uses and says nothing about how to care for them — or worse, tells you to wash after every session — they are thinking about the sale, not the lifecycle.

The Checklist

Before you buy, run through this quickly:

• ☐ Named certifications, ideally with certificate numbers you can look up.
• ☐ Named anti-odour technology — not vague "odour-resistant" language.
• ☐ Named manufacturing location, or a certified facility you can verify.
• ☐ Named fibre brand or origin — not just "recycled" or generic fibre types.
• ☐ Washing guidance that prioritises sustainability: less often, cooler, air-dry.

Five out of five is rare. Three out of five is a brand that's trying. Zero out of five, with a lot of leaves and earth tones on the homepage, is greenwashing.

Where APRÍ stands

We publish all of this. Every certification, every technology, every factory. If you want to put us through the checklist yourself, start with our technology pages and our certifications — then compare what you find against whichever other brand you're considering. That's the only way any of this means anything.