How to Spot Greenwashing in Material Claims: 6 Honest Tests

Greenwashing usually is not an outright lie. It is a true-sounding statement with the checkable part removed. For material buyers the defence is not scepticism but method: six tests you can run on any claim in a few minutes, before it ends up on your own product page and becomes your problem.

1. Is the claim specific enough to be checked?

The first test is whether the statement could ever be proven false. “Made with sustainable materials” cannot be checked; “contains 40 per cent recycled cotton, verified to a recognised recycled-content standard” can. Vague wording is the most common form of greenwashing precisely because it is safe. When a claim resists being made specific, that resistance is the finding.

2. Does the claim name a standard, or just a feeling?

Ask which standard backs the claim and who audits it. A recognised standard traces material through the supply chain and can be requested as a certificate for your specific order. A logo-like badge invented by the seller, or a phrase such as “eco-conscious range”, carries no verification. This is the single fastest sort: standard named and certificate available, or not.

3. Does one good attribute stand in for the whole product?

A common move is to highlight one genuinely better component while the rest of the product is unchanged. A bag with a recycled lining and a conventional outer is not a recycled bag. Ask what share of the finished item the claim actually covers, by weight or by area. If nobody can tell you, the claim is doing more work than the material is.

4. Is the comparison hidden?

“Lower impact” invites the question: lower than what? A material can be lower-impact than the worst option available and still be unremarkable. Ask what the baseline is and whether it is the material you would otherwise have bought. A claim without a stated comparison is not measurable, and an unstated baseline is usually chosen to flatter.

5. Does the imagery say more than the words?

Leaves, earth tones and nature photography carry an impression that the text never actually claims. This matters for buyers in two directions: you should discount it when assessing a supplier, and you should watch for it in your own marketing, because visual implication is increasingly treated as part of the claim under environmental-claims rules in major markets.

6. Will they put it in writing for your order?

The final test collapses the rest. Ask for the claim, restated for the specific material you are buying, with the standard named and the certificate attached. Suppliers with a documented material do this routinely. If a claim survives that request intact, it is probably real; if it becomes vaguer under pressure, you have your answer. That is also the discipline that protects your own material choices when a customer or regulator asks you the same question.

The mistake buyers make in the other direction

There is an opposite failure worth naming: treating every unproven claim as dishonest. Plenty of suppliers hold genuinely better material and simply describe it badly, because the person writing the product copy is not the person who holds the test reports. If you discard those suppliers you narrow your options for no gain. The six tests above are a sorting tool, not a verdict — run them, then ask once for the specific written version. What separates a communication problem from an empty claim is what arrives after that request.

Turning the tests into a habit

The practical version of all this is a short standing request you send with every material enquiry: state the claim for this specific material, name the standard, attach the certificate, and confirm what share of the finished item it covers. Suppliers who can answer will answer quickly, and the ones who cannot will reveal it without any confrontation. Over time the same file also becomes your own evidence base, which matters as environmental-claims rules in major markets increasingly expect sellers to substantiate what they say rather than to explain it afterwards.

Frequently asked questions

Is greenwashing always deliberate?
Often not. Vague claims get repeated down a supply chain until nobody can point to the original evidence. That is why the fix is documentation for your specific order rather than assigning blame.

Which words are the biggest warning signs?
Absolute or unqualified terms with no standard attached, and comparative words with no stated baseline. If a phrase would sound equally good about almost any product, it is probably not telling you anything.

What should I do if a supplier claim fails these tests?
Ask for the specific version in writing before walking away. Some suppliers have the evidence but describe it badly. The request separates poor communication from an absent basis.

Related materials

• Eco Textiles
• Recycled Cotton
• Certifications

Ask us for the standard and certificate behind any material. Swatches, sampling and certification documentation are available through SUS Materials on request.

References

1. Independent textile standards verify sustainability claims through supply-chain traceability rather than self-declaration. textileexchange.org