Sustainable clothing labels explained: GOTS, OEKO-TEX and recycled claims

A clothing label is not a complete sustainability verdict. It is an evidence signal for a specific claim, and the useful question is not whether a label looks green, but what it actually proves.

Most shoppers do not have time to audit a garment supply chain. That is why labels matter. A credible certification can turn a vague claim into something more testable: organic fibre content, chemical safety, recycled input, fairer trading terms, chain-of-custody evidence or a narrower environmental claim.

But labels are also easy to misuse. A product can be tested for harmful substances without being organic. A garment can contain recycled polyester while still being hard to recycle at the end of life. A brand can use broad sustainability language while the actual evidence applies only to one collection, one fabric or one factory.

The practical approach is to treat clothing labels as questions, not answers. What does the label cover? Who checks it? Does it apply to the product, the material, the factory, the brand or the packaging? What important impacts does it leave out?

Quick answer

The useful way to read a clothing label

The mistake is to ask whether a label is good or bad in the abstract. A better question is: what risk is this label trying to reduce?

Some labels focus on fibre origin. Others focus on chemical safety, recycled input, trading terms, forestry risk, animal welfare or company-wide governance. Those are not interchangeable. A harmful-substance label and an organic-fibre label can both be useful, but they answer different questions.

This matters because the strongest clothing decisions usually combine several layers of evidence. A plain cotton T-shirt might be made from certified organic cotton, tested for restricted substances, produced by a transparent supplier, designed to last, repairable enough to keep in use and sold by a company that avoids constant discount-led overproduction. No single badge proves all of that.

GOTS: what organic textile certification means

GOTS (Global Organic Textile Standard) is one of the best-known standards for textiles made with organic fibres. Its importance is that it does not only look at a raw fibre claim. It sets requirements for processing stages after the farm, including chemical inputs, environmental management, labelling and social criteria.

For shoppers, GOTS is most useful when a brand is claiming that a garment is made from organic cotton, organic wool, organic linen or another organic natural fibre. It can help distinguish a certified textile claim from loose organic language.

It is still not a complete sustainability score. GOTS does not tell you how many times you will wear the garment, whether the cut will last, whether the brand overproduces, whether the product was shipped efficiently or whether the price reflects good long-term value. It is a strong evidence signal for organic textile processing, not a universal impact ranking.

OEKO-TEX STANDARD 100: what it checks

OEKO-TEX STANDARD 100 is often misunderstood. It is not an organic label. It is a product safety and harmful-substance testing label for textiles. The standard checks textile articles and components against a restricted-substance list, with product classes that reflect how close the textile is to the skin and who is likely to use it.

That can be valuable. If you are buying underwear, baby clothes, bedding or basics worn close to the skin, harmful-substance testing is a meaningful issue. But it is not the same thing as saying the cotton is organic, the polyester is recycled, the garment is low carbon or the brand has a low-waste business model.

The distinction matters because brands sometimes place several positive-sounding claims next to each other. A shirt could be OEKO-TEX certified for harmful-substance testing while using conventional cotton. Another shirt could use organic cotton but not carry the same product safety label. Those are different evidence signals.

Recycled labels: GRS and RCS

Recycled-content claims are attractive because they sound concrete. A garment made with recycled polyester or recycled nylon may reduce demand for virgin fossil-based fibre inputs. But the claim needs evidence, especially when recycled percentages, blended fabrics and supplier chains are involved.

Textile Exchange standards are often used here. RCS (Recycled Claim Standard) is focused on verifying recycled material and chain of custody. GRS (Global Recycled Standard) goes further by including recycled content verification alongside additional requirements covering social, environmental and chemical practices.

The limitation is equally important. Recycled content does not mean the final garment is recyclable. A blended fabric can still be difficult to recycle. A recycled polyester garment may still shed microfibres. A product can use recycled material and still be part of a business model that encourages excessive purchasing.

For that reason, recycled content is best read as one input claim. It is not a free pass for the whole product.

Fairtrade Cotton, Better Cotton and cotton claims

Cotton claims are especially confusing because different labels answer different questions.

Fairtrade Cotton is connected to social and trading standards for cotton farmers. It is relevant when the concern is farmer income, trading terms and supply-chain fairness. It should not be read as identical to organic cotton unless the product also has an organic certification.

Better Cotton is a large-scale cotton improvement programme. It can be relevant to farmer training, agricultural practices and cotton sourcing at scale. But consumers should be careful about product-level assumptions. Better Cotton claims may involve chain-of-custody and sourcing models that are not the same as saying a specific item is physically traceable to a specific certified farm.

Organic cotton is different again. It concerns how cotton is grown, with restrictions on certain synthetic inputs. For that topic, see our organic cotton basics guide.

GOTS vs OEKO-TEX vs recycled content

Why labels do not tell the whole story

The lowest-impact clothing decision is often not the one with the longest list of labels. It is the one that gets worn often, washed sensibly, repaired where possible and kept out of landfill for longer.

Labels can help with material and supplier evidence, but they rarely capture the whole life of a garment. A certified organic shirt that is worn twice and forgotten is not automatically better than an existing shirt that is worn for years. A recycled-polyester fleece may reduce virgin material demand, but it may still carry washing and microfibre concerns. A product made from a natural fibre may still be poorly constructed, overproduced or heavily discounted into impulse purchases.

That is why the strongest clothing advice is boring but useful: buy fewer items, choose things you will actually wear, check fabric and construction, avoid vague claims, repair basics, and prefer evidence over marketing language.

How to check a clothing sustainability claim

The UK Competition and Markets Authority (CMA) Green Claims Code is useful here because it gives a practical test for environmental claims. Claims should be truthful and accurate, clear, not hide important information, make fair comparisons, consider the full life cycle where relevant and be backed by evidence.

For clothing, that means a brand should not make a broad claim like "eco-friendly" if the evidence only supports one narrow material claim. It should not imply that a whole garment is sustainable if only the packaging is recycled. It should not claim that a product is "better" without explaining the comparison. It should not present a collection-level claim as if it applies across the whole brand.

Here is a practical checklist before trusting a claim:

• Look for a named standard, not just a green word.
• Check whether the claim applies to the whole product or one input.
• Look for a certification number, product certificate or verification page if the claim is central to the purchase.
• Check fibre composition, not only the marketing headline.
• Ask whether the label covers chemicals, organic fibre, recycled content, trading conditions or something else.
• Consider durability, repairability and whether you will wear it often.
• Be cautious with vague words like conscious, planet-friendly, responsible, eco or low impact unless the evidence is clear.

What labels mean for brands and suppliers

For brands, labels are not only marketing tools. They are evidence-management systems. If a product claim appears on a website, hang tag, advert, marketplace page or investor deck, the business should be able to show the evidence behind it.

That evidence might include supplier certificates, transaction certificates, scope details, licence numbers, material composition records, testing documents, purchase orders and internal review records. The point is not to collect documents for their own sake. The point is to avoid making claims that the business cannot substantiate when challenged by customers, regulators, retailers or journalists.

This is where clothing claims connect to wider ESG data rooms. A brand that sells sustainability on the front end needs a clean evidence trail behind the scenes.

When a label is useful, and when it is not enough

Common mistakes when reading clothing labels

The first mistake is treating a label as a moral ranking. A certification may be credible and still narrow. OEKO-TEX STANDARD 100 can be useful without being an organic standard. GOTS can be strong without proving that a garment is the best possible purchase. Recycled content can be positive without solving durability or end-of-life issues.

The second mistake is ignoring scope. "Made with recycled materials" may mean a percentage of one component. "Organic cotton" may refer to the outer fabric but not trims, thread, dyeing or packaging. "Responsibly sourced" may be a brand policy rather than a product-level certificate.

The third mistake is assuming expensive means better. Price can reflect quality, labour, design or brand positioning, but it is not evidence by itself. The same is true in reverse: a lower-cost item is not automatically worse if it is durable, used often and backed by clear evidence.

FAQ

Is GOTS better than OEKO-TEX?

They answer different questions. GOTS is an organic textile standard covering certified organic fibre content and processing requirements. OEKO-TEX STANDARD 100 is a harmful-substance testing label for textile products and components. One is not a direct replacement for the other.

Does OEKO-TEX mean organic?

No. OEKO-TEX STANDARD 100 does not mean the fibre is organic. It means the tested textile article meets the standard's harmful-substance requirements.

Does recycled polyester make clothing sustainable?

Not by itself. Recycled polyester can reduce reliance on virgin polyester inputs, but the garment may still have durability, microfibre, overproduction and end-of-life issues. Treat recycled content as one evidence point.

What is the safest label to look for when buying basics?

There is no single safest label for every purchase. For cotton basics, organic textile certification, harmful-substance testing and clear fibre composition can all be useful. Durability and fit still matter because the best item is usually the one that gets worn repeatedly.

Are brand sustainability pages enough?

They can help, but they are not the same as product-level evidence. A brand page may describe policies, targets or selected materials. A product claim should still be clear about the specific garment, material or certification it relies on.

Useful source links

• Global Organic Textile Standard: the standard
• OEKO-TEX STANDARD 100
• Textile Exchange standards
• UK CMA Green Claims Code