Eco Workwear Certifications: What Each Label Covers

An eco workwear certification is independent proof of one specific thing: how the fibre was grown, which chemicals were used, how a factory is run, or what happens to the garment at end of life. No single label covers all four. For UK buyers, the useful ones are GOTS, OEKO-TEX (Standard 100, STeP and MADE IN GREEN), bluesign and recycled-content schemes such as GRS. None of these replaces UKCA marking on PPE and hi-vis clothing.

This guide sets out what each label certifies, how GOTS and OEKO-TEX differ, what makes workwear sustainable in practice, and how to check a supplier’s claim before a bulk order.

TL;DR

• GOTS certifies organic fibre content and the whole production chain. OEKO-TEX Standard 100 tests the finished product for harmful substances only.
• MADE IN GREEN and STeP from OEKO-TEX, and bluesign, cover manufacturing and chemical management, not just the end product.
• Safety certification is separate. PPE and hi-vis must carry the UKCA mark on the GB market. An eco label does not substitute for it.
• For uniforms, a long garment life and a traceable end-of-life route usually matter more than the fibre alone.
• Ask for the scope certificate for every product described as eco. A logo without a certificate is not proof.

Table of Contents

• What an eco certification actually proves
• The main certifications compared
• GOTS: organic fibre with audited processing
• OEKO-TEX: three different labels under one name
• GOTS vs OEKO-TEX: which should a buyer ask for?
• bluesign: chemistry and resource use
• Recycled-content labels such as GRS
• Safety certification is a separate legal requirement
• What makes workwear sustainable beyond the label
• How to check an eco claim before ordering
• Matching certifications to sectors
• Our perspective
• Specifying eco options for a team order
• FAQ
• Sources

What an eco certification actually proves

A certification is a third party confirming that a defined standard has been met. The words “eco”, “green” and “sustainable” have no such definition. Even “organic” is not legally defined for textiles in the UK, as one UK textile retailer’s guide to avoiding greenwashing points out, unlike food.

Three questions sort every label:

1. What is certified? The raw material, the chemicals in the finished garment, the factory, or the brand.
2. Who checks? An independent auditor or laboratory, or the supplier itself.
3. Does it apply to this product? A certified factory does not make every garment it produces certified.

The third question causes most problems. The CMA’s guide for fashion businesses under the Green Claims Code says a business using an accreditation scheme should be clear whether the certification covers the product, the factory or the wider brand.

The main certifications compared

The sections below take each in turn.

GOTS: organic fibre with audited processing

The Global Organic Textile Standard is the best known label for organic fibres. According to a UK summary of the standard, a product needs at least 95% certified organic fibres to be labelled “organic” and at least 70% for “made with organic”. The standard requires independent audits of the supply chain, prohibits toxic dyes and heavy metals, and applies social criteria based on ILO standards.

The published GOTS standard describes its aim as covering textiles from harvesting of raw materials through environmentally and socially responsible manufacturing to labelling.

Where it fits in workwear. GOTS suits organic cotton garments: polo shirts, T-shirts, aprons, tote bags. It is a poor match for heavy-duty polyester/cotton blends, because the organic share in a blend is often too small to qualify. A “made with organic” label also means up to 30% of the fabric is something else, so the label needs reading carefully.

OEKO-TEX: three different labels under one name

The OEKO-TEX name is often used loosely. Three of its labels matter to buyers.

• Standard 100 tests the finished textile, including threads, buttons and zips, against lists of harmful substances. A sustainable clothing guide notes it focuses strictly on substance testing. It says nothing about where the cotton was grown or how workers are treated.
• STeP assesses the production facility for environmental management and social conditions.
• MADE IN GREEN links the two: the article has passed Standard 100 testing and was made in STeP-certified facilities. It also carries a product ID that can be traced online.

For a buyer who wants one label that covers both skin safety and production conditions, MADE IN GREEN is the more complete claim. Standard 100 alone is a safety label, and should be described as one.

GOTS vs OEKO-TEX: which should a buyer ask for?

The two are not rivals. They answer different questions.

A practical rule: GOTS for organic cotton garments, OEKO-TEX (ideally MADE IN GREEN) for mixed-fibre uniforms where the aim is a verified low-chemical product. Both can appear on the same garment.

bluesign: chemistry and resource use

bluesign meaning, in short: a system run by bluesign technologies that focuses on chemical safety and environmental impact in textile production. An outdoor-gear explainer describes it as an independent system covering sustainable chemistry and environmental impact. A product may use bluesign approved materials, or a brand may be a bluesign system partner. These are different claims, and the second does not mean every garment from that brand is bluesign certified.

It is most often found on technical outerwear and performance fabrics. In workwear it appears on some waterproof and technical shells. For rating those garments on performance, see the guide to waterproof jacket ratings for UK workwear buyers.

Recycled-content labels such as GRS

The Global Recycled Standard verifies recycled content and traceability. It suits recycled polyester items such as fleeces, jackets and some trousers. The label says how much recycled material is present and tracks it. It does not, on its own, say anything about dyes or working conditions.

Safety certification is a separate legal requirement

Eco labels sit alongside safety rules, not in place of them. The HSE’s guidance, Personal protective equipment at work (L25), explains the conformity framework introduced after the UK left the EU. PPE placed on the Great Britain market must carry the UKCA mark from 1 January 2025 where the relevant rules apply. That includes high-visibility clothing tested to EN ISO 20471. Check the current HSE guidance, or the supplier’s declaration of conformity, for the exact status of a specific product, since transitional rules can change.

In practice, a hi-vis jacket made from recycled polyester and carrying a GRS label still has to meet the safety standard. A garment can be sustainable and non-compliant, which makes it unusable on site. Buyers specifying site clothing can review custom hi-vis uniform options with the safety standard as the first filter and environmental documentation as the second.

What makes workwear sustainable beyond the label

Certificates describe inputs. The life of the garment decides much of the real impact.

The European Commission’s circular economy platform hosts ecodesign criteria for consumer textiles, and industry bodies such as ETSA point out that workwear is stressed harder than fashion clothing. Their emphasis for this sector is durability and repairability, followed by a traceable recovery route.

For procurement, that translates into specification points:

• Fabric weight and construction. A garment that lasts three years instead of one halves replacement volume. See what procurement teams must specify on GSM and when to choose ripstop or twill.
• Fit stability. Garments that shrink get rejected by staff. Test washing before bulk orders avoids waste.
• Branding method. Heavy embroidery can complicate recycling. Embroidery versus printing for 20 to 100+ uniforms sets out the trade-offs, and DTF versus screen printing does the same for smaller orders.
• Repair and replacement. Standardised styles make it possible to replace a single item instead of a full kit.
• End of life. Uniform recyclers such as Roberts Group International describe industrial shredding with full traceability. Large volumes generally need audit-ready records, so ask what the recovery route is before the order, not after.

How to check an eco claim before ordering

The CMA secured commitments from ASOS, Boohoo and George at Asda in 2024, as set out in the CMA announcement. The CMA also issued a tailored guide for fashion brands. The direction is clear: environmental claims need to be accurate and not misleading, and the same discipline helps a buyer vet a supplier.

1. Ask which product the certificate covers. Request the scope certificate or licence number, not the logo.
2. Check validity dates. Certificates expire and are renewed.
3. Check the certifier’s database. GOTS and OEKO-TEX run public lookups for licensed products and facilities.
4. Separate the claims. Organic fibre, recycled content, low chemicals and ethical production are different claims. Ask for each one separately.
5. Match the claim to the garment. An organic cotton polo and a recycled polyester shell need different evidence.
6. Keep the records. A folder of certificates per product line makes internal audits and tender responses faster.

Public-sector buyers can also use WRAP’s guidance on ethical and sustainable textile procurement, which lists further schemes such as Blue Angel and Fair Wear.

Matching certifications to sectors

Our perspective

We supply branded workwear and uniforms across construction, hospitality, education and security, and the same mistake appears in each sector: a label is treated as the whole answer. A certificate is evidence about one part of the garment. It tells nothing about whether staff will wear it for three years.

Our view is that an eco specification for uniforms should have three layers. First, the garment must do its job and meet any safety requirement. Second, it should last, so fabric weight, construction and shrinkage matter. Third, where a certification is claimed, the scope should be documented for the exact product ordered.

We also hold that branding method belongs in the sustainability conversation. Embroidery and printing choices affect how a garment can be repaired, re-issued or recycled. That is better decided at the quote stage than at disposal.

We recommend asking for the certificate before the order, and we advise buyers to treat any supplier unwilling to provide one as a warning sign.

— Vinay

Specifying eco options for a team order

Cwear supplies personalised polo shirts, T-shirts, jackets, hoodies, PPE and hi-vis workwear, with embroidery and printing and artwork mockup approval before production. Environmental documentation varies by product, so request the details for the specific items on a quote. Buyers can browse corporate wear, see the full collections, or go to the Cwear site to request a quote for a team order. One organic cotton product is the organic cotton mini mesh grocery bag.

FAQ

Is GOTS better than OEKO-TEX?

Neither is better outright, because they test different things. GOTS certifies organic fibre content and audited processing, while OEKO-TEX Standard 100 tests the finished product for harmful substances. MADE IN GREEN extends OEKO-TEX to production conditions.

What does bluesign mean on a garment?

It indicates a link to the bluesign system, which focuses on chemical safety and environmental impact in textile production. Check whether the label refers to approved materials, a certified product or a brand that is a system partner, since these are different claims.

What makes clothing sustainable?

Sustainable clothing combines responsible materials, cleaner production, a long working life and a route for reuse or recycling. For workwear, durability and traceable end of life often matter more than the fibre alone. Certifications verify individual parts of that chain.

Does an eco label replace UKCA marking on hi-vis and PPE?

No. UKCA marking is a legal conformity requirement for PPE on the GB market, set out in HSE guidance. Environmental labels such as GRS or OEKO-TEX are additional and voluntary.

How can a buyer tell whether an eco claim is genuine?

Ask for the scope certificate covering the exact product, check its validity date and look up the licence with the certifier. The CMA’s Green Claims Code expects claims to be clear about what a certification covers.

Sources

• Why GOTS organic certification of textiles is so important, Sleep Organic
• Global Organic Textile Standard, version 6.0
• Eco, Ethics & ELLE
• Bluesign explained, Better Trail
• Personal protective equipment at work, HSE (L25)
• Green claims guide for fashion businesses, CMA
• Green claims: CMA secures landmark changes from ASOS, Boohoo and Asda, GOV.UK
• Greenwashing: CMA issues tailored guide for fashion brands, GOV.UK
• Ecodesign criteria for consumer textiles, European Circular Economy Platform
• Uniform and workwear recycling, Roberts Group International
• Guidance on ethical and sustainable textile procurement, WRAP
• How to buy an organic cotton duvet cover in the UK without being greenwashed, Cottsbury

Recommended

• Authentic eco polo
• Match Rating to Role: Waterproof Jacket Ratings for UK Workwear Buyers
• 140–400+ GSM: What Procurement Teams Must Specify for Workwear
• Workwear Shrinkage: UK Buyers Should Test Wash Before Bulk Orders