Fashion Sustainability Claims Without Greenwashing

Fashion carries more environmental claims per product than almost any other category, and until recently most of them were unfalsifiable by design. Directive (EU) 2024/825 changed the rules for making them, and the practical effect is that a marketing decision now depends on a supply chain record.

The useful way to approach this is not as a legal compliance exercise but as a question about evidence: if someone asked you to prove this sentence, what would you hand them, and who signed it?

What is now prohibited outright?

The last row is the entire strategy. Specific claims with evidence remain fully available, and they perform better commercially than vague ones because they are checkable. The claims being removed are the ones that were doing no work beyond signalling.

The test worth applying before publication

1. Name the exact product or product group the claim applies to, not the brand.
2. State what is measured, in what unit, over what boundary.
3. Identify who asserted the underlying figure, and whether they signed it.
4. Confirm the evidence covers the goods actually sold, not a pilot or a sample.
5. Ask what a competitor would say if they wanted the claim removed.

Step five is the one that catches problems earliest. Competitors have both the motive and the technical knowledge to challenge a claim, and in practice they act faster than any regulator, through advertising standards bodies and unfair competition routes.

Why recycled content claims fail most often

The figure is rarely the problem. The chain of custody behind it usually is. A recycled polyester claim rests on a mass balance somewhere upstream, and mass balance permits a claim about a system rather than about a specific garment.

That is legitimate when described accurately and misleading when described as though the physical garment contains the recycled material. The distinction is set out in chain of custody models compared, and it is the single most common failure point in fashion claims.

Durability claims and how to make them stick

Durability is the claim with the best regulatory tailwind, since the ESPR is expected to treat it as a parameter, and the worst measurement discipline in current marketing use. Made to last means nothing without a method.

A defensible durability claim names a test, a result and a comparison basis: abrasion cycles to a defined standard, colour fastness after a stated number of washes, dimensional stability within a tolerance. Those are already measured in most quality programmes, which makes this the cheapest strong claim available to a fashion business.

Claims about circularity and take-back

Recyclable is a claim about a possibility, and consumers read it as a claim about an outcome. Where no collection route exists for the garment in the markets where it is sold, describing it as recyclable is exactly the kind of claim the directive targets.

A stronger formulation states the mechanism: which take-back route exists, in which markets, and what happens to the garment. That is harder to write and far harder to challenge, and it has the advantage of being true — the design considerations are covered in designing a take-back programme that works.

Where the passport fits

The failure pattern is a claim held in a brand system and its evidence held in a compliance folder, reconciled only when someone asks. The passport removes that gap by keeping the claim next to the signed assertion supporting it, which is the mechanism described in verifiable credentials explained.

What to do about claims already in market

Audit them before someone else does. The exercise is unglamorous and takes a few weeks: list every environmental claim currently appearing on packaging, labels, product pages and campaigns, then attempt to produce evidence for each.

Expect a meaningful proportion to fail, usually generic terms inherited from older campaigns and recycled content claims resting on certificates. Retiring a claim quietly is inexpensive; defending one you cannot evidence is not, and the reputational cost of an NGO publishing the failure exceeds any penalty.

What about claims made by your suppliers?

Brands increasingly repeat supplier claims in their own voice: a mill states that a fabric is made with renewable energy, and the statement reappears on a product page as the brand’s assertion. That transfer is where liability moves without anyone deciding it should.

Restating a supplier claim makes it yours. If the mill cannot evidence it, you cannot either, and the consumer-facing party is the one a regulator or a complainant approaches. The safer pattern is attribution: state who made the claim and hold their signed assertion, so the evidence travels with the statement.

This is also the practical reason to require signed declarations rather than values in a spreadsheet. A signed assertion is something you can produce when challenged; a figure transcribed from an email is a claim you have adopted without any means of supporting it.

Who should own this internally?

Marketing writes the claims, sustainability holds the data, legal carries the risk and procurement controls whether the evidence can be obtained at all. Left to itself the process runs in that order, which means the claim exists before anyone checks whether it can be supported.

Reversing it is the whole intervention: evidence first, claim second. In practice that means a claim cannot be signed off without naming the field in the product record it derives from, and the field cannot be populated without an asserting party attached.