Sustainable is one of the most overused words in fashion. Almost every brand uses it in some form — but the word itself means nothing without evidence. Certifications exist to provide that evidence: independent third-party verification that a product or manufacturing process meets specific standards.
In activewear, three certifications are most relevant and most credible: OEKO-TEX Standard 100, GOTS (Global Organic Textile Standard), and Bluesign. Here's what each one actually tests, what it guarantees to you as a consumer, and where its limits are.
OEKO-TEX Standard 100
What It Tests
OEKO-TEX Standard 100 is a product-level certification. It tests finished textile products for the presence of 100+ harmful substances including:
- Heavy metals (including silver, zinc, lead, cadmium, chromium, nickel)
- Pesticide residues
- Certain PFAS compounds
- Formaldehyde (a common finishing agent)
- pH value (relevant for skin compatibility)
- Allergen-causing dyes and colourants
- Biocides and flame retardants
Every component of a certified product is tested — not just the outer fabric, but lining, labels, buttons, zippers, and thread. A garment can only carry the OEKO-TEX 100 label if every component passes.
What It Guarantees
OEKO-TEX 100 guarantees that the finished product you're wearing has been independently tested and found to contain no harmful substances above defined safety thresholds. It's a skin safety certification: the product is safe for direct, prolonged contact with your skin.
What It Doesn't Cover
OEKO-TEX 100 tests the product, not the manufacturing process. A brand can produce garments using environmentally damaging processes, poor labour conditions, or unsustainable raw materials — and the finished product can still be OEKO-TEX 100 certified if it tests clean for harmful substances. The certification tells you about product safety, not supply chain ethics or environmental production impact.
GOTS — Global Organic Textile Standard
What It Tests
GOTS is a more comprehensive certification that covers both the organic status of raw materials and the social and environmental standards of the entire production chain. To receive GOTS certification:
- At least 70% of the textile content must be certified organic fibres (95% for the organic label tier)
- All chemical inputs — dyes, auxiliaries, processing agents — must meet strict environmental and toxicological criteria
- Wastewater treatment standards must be met at manufacturing facilities
- Social criteria must be met: no child labour, fair wages, safe working conditions (based on ILO standards)
- The entire certified supply chain — from farm through to final label — must be independently audited
What It Guarantees
GOTS is one of the most rigorous textile certifications available. It guarantees that the raw material is organically produced, that the production process meets defined environmental standards throughout the supply chain, and that basic social standards are met at every processing stage. It's the closest thing to a comprehensive ethical and organic certification in textiles.
What It Doesn't Cover
GOTS requires organic raw materials — which limits its applicability to natural fibres. Lyocell from sustainably managed forests (rather than certified organic agriculture) occupies a grey area: TENCEL™ Lyocell from sustainably sourced wood can be GOTS-compatible when processed under GOTS-certified conditions, but the organic designation requires certified organic forest management.
GOTS also doesn't specifically certify performance or durability — it's an environmental and social standard, not a product performance standard.
Bluesign
What It Tests
Bluesign is a manufacturing-process certification focused specifically on the chemistry and resource efficiency of textile production. It:
- Audits and approves the specific chemicals used in fabric dyeing, finishing, and treatment
- Sets standards for resource efficiency (water use, energy use, chemical management)
- Requires specific wastewater treatment and discharge standards
- Verifies that approved processes result in products that are safe for workers, consumers, and the environment
The Bluesign system certifies both the manufacturing facilities and the specific chemical processes used — not just the final product.
What It Guarantees
A Bluesign-certified product was made using chemistry that has been independently reviewed and approved as responsible — minimising resource consumption, preventing hazardous substances from entering production, and protecting worker safety in manufacturing. It's a supply chain chemistry standard.
What It Doesn't Cover
Bluesign focuses on manufacturing chemistry. It doesn't certify the organic status of raw materials, social labour conditions beyond its manufacturing partner standards, or final product performance. It's complementary to OEKO-TEX and GOTS rather than a substitute for either.
How They Work Together
The three certifications address different parts of the picture:
| Certification | What It Covers | Best For Knowing |
|---|---|---|
| OEKO-TEX Standard 100 | Final product safety — no harmful substances | Is it safe to wear against my skin? |
| GOTS | Organic raw materials + full supply chain social and environmental standards | Was the whole chain — from farm to finished product — ethical and organic? |
| Bluesign | Manufacturing chemistry and process safety | Were responsible chemicals used to make this? |
A brand with all three certifications has demonstrated: their finished product is safe (OEKO-TEX), their manufacturing chemistry is responsible (Bluesign), and their supply chain meets social and environmental standards (GOTS). That's a meaningful trifecta.
What APRÍ's Certifications Mean in Practice
APRÍ holds OEKO-TEX Standard 100, GOTS, and Bluesign certifications. In practical terms for someone buying an APRÍ garment:
- The garment has been independently tested for 100+ harmful substances including heavy metals and PFAS (OEKO-TEX 100)
- The chemicals used in production — including our HeiQ Mint and NordShield anti-odour treatments — meet responsible chemistry standards (Bluesign)
- The production chain has been audited for environmental and social standards (GOTS)
These aren't marketing claims. Each certification requires annual independent auditing and testing to maintain — if a standard slips, the certification lapses. They represent ongoing accountability, not a one-time assessment.
The Bottom Line
Sustainability certifications matter because the alternative — brand-level sustainability claims without third-party verification — is unverifiable. OEKO-TEX, GOTS, and Bluesign are the three most credible frameworks in textiles. Understanding what they test, what they guarantee, and where their limits are helps you make informed decisions as a consumer rather than relying on marketing language.
Look for the logos. They mean something.
Learn about APRÍ's sustainability commitments →
Frequently Asked Questions
What does OEKO-TEX certified mean?
OEKO-TEX Standard 100 is a product-level certification that tests finished textiles for more than 100 harmful substances, including heavy metals such as silver and zinc, pesticide residues, certain PFAS compounds, formaldehyde, allergenic dyes and biocides. Every component of a certified garment — fabric, lining, labels, zippers, thread — must test clean. If a garment carries the OEKO-TEX 100 label, the finished product has been independently verified as safe for direct, prolonged contact with the skin. It does not cover supply chain ethics or manufacturing sustainability — those are addressed by GOTS and Bluesign respectively.
Is GOTS the same as organic?
Not exactly. GOTS (Global Organic Textile Standard) requires organic raw materials as part of a broader standard, but it goes further than most organic labels. To be GOTS certified, at least 70% of the textile content must be certified organic fibres (95% for the top organic tier), all chemical inputs must meet strict environmental and toxicological criteria, wastewater treatment standards must be met, and social standards based on ILO conventions must be audited through the supply chain. So GOTS is more comprehensive than simply organic — it covers the fibre, the processing and the labour behind it.
What is the difference between OEKO-TEX, GOTS and Bluesign?
The three certifications address different parts of the picture. OEKO-TEX Standard 100 tests the finished product for harmful substances and confirms it is safe to wear against skin. GOTS covers the whole supply chain, requiring organic raw materials, responsible chemistry and audited social standards. Bluesign focuses on manufacturing — auditing the specific chemicals, water and energy used in production. A brand holding all three has demonstrated product safety, responsible manufacturing chemistry and ethical supply chain standards, rather than relying on self-declared sustainability claims.
