OEKO-TEX Standard 100 Certification Explained
International (Switzerland-based) · Established 1992
Audit Level: Third-Party Audit
An independent third party conducts an audit of the brand's facilities or documentation. More rigorous than self-declaration.
Supply-chain verified: No.
| Supply Chain | Not required |
| Cost for Brands | Annual certification fee. Varies by product type and testing requirements. |
| Recognized In | Global — 100+ countries |
Editorial Analysis
Tests every component of a textile product for harmful substances including pesticides, heavy metals, formaldehyde, and allergenic dyes. Protects consumers from wearing fabrics containing hazardous chemicals. Does not address vegan status — wool and silk products can be OEKO-TEX Standard 100 certified. Does not assess production methods, only the final product's chemical content.
In depth
How the certification and testing process works
OEKO-TEX Standard 100 is a product-level testing and certification system run by the OEKO-TEX Association, a network of independent textile research and testing institutes founded in 1992. A manufacturer submits a finished article or an input material — fabric, yarn, trim, or accessories — to a member institute, which tests it in a laboratory against a catalog of harmful substances. The catalog covers legally regulated chemicals such as formaldehyde, certain azo dyes, heavy metals, and pesticides, as well as substances that are not yet regulated but are considered potentially harmful to health.
Products are assigned to one of four product classes based on skin contact. Class I, the strictest, covers items for babies and toddlers; Class II covers products worn directly against the skin, such as underwear and bedding; Class III covers articles without prolonged skin contact, such as outerwear; and Class IV covers furnishing materials like curtains and upholstery. Every component of the article — sewing thread, buttons, zippers, prints, and coatings — must meet the limit values. Certificates are valid for one year, and the criteria catalog is reviewed and updated annually, with limit values that often go beyond national legal requirements.
What the label does and does not guarantee
The Standard 100 label certifies a single claim: the tested product stayed below the standard's limit values for harmful substances at the time of testing. It is a consumer chemical-safety mark, not a statement about how the product was made or what it was made from.
The label does not address fiber origin. Wool, silk, down, cashmere, and other animal-derived textiles can all carry the Standard 100 label, so it is not a vegan indicator in any sense. It also does not certify organic fiber content, and it does not evaluate the environmental performance of the factories involved — water use, wastewater treatment, energy consumption, and working conditions fall outside its scope. OEKO-TEX addresses those areas through separate programs, such as STeP for facility-level production conditions and MADE IN GREEN for supply-chain traceability.
For vegan shoppers, the practical takeaway is that the label answers only the question of chemical residues in the finished product. Material composition must be checked separately on the fiber content label, which is legally required on textiles in most major markets.
Reading and verifying the label
The Standard 100 mark appears on hang tags or sewn-in labels and typically carries the wording "Tested for harmful substances," along with a certificate number and the name of the testing institute that issued it. Because certificates are renewed annually, OEKO-TEX provides an online label check on its website where any certificate number can be entered to confirm that it is valid and to see what product scope it covers. A number that cannot be verified, or that has expired, is a reason for caution.
One nuance worth knowing: a certificate can apply to the finished article or to a certified input material used in it, so the scope shown in the label check matters. A garment sewn from certified fabric is not automatically a certified garment unless the whole article, including thread and trims, was certified.
The certificate scope, like the label itself, says nothing about fiber origin. The fiber composition label — for example "100% cotton" or "70% wool, 30% polyamide" — is where animal-derived content is disclosed.
How it compares with adjacent certifications
Standard 100 is often confused with certifications that cover different ground. GOTS (Global Organic Textile Standard) requires organic fiber content and adds environmental and social criteria throughout processing; Standard 100 requires none of that and focuses solely on chemical residues in the end product. The two can appear on the same item and are complementary rather than interchangeable.
Within the OEKO-TEX family, MADE IN GREEN combines Standard 100 product testing with STeP certification of production facilities and adds a traceable product ID, making it the more demanding OEKO-TEX label. LEATHER STANDARD by OEKO-TEX applies analogous harmful-substance testing to leather articles — a reminder that the OEKO-TEX system as a whole certifies animal-derived materials and is not aligned with vegan criteria.
For animal-related claims, dedicated schemes such as PETA-Approved Vegan address material composition but say nothing about chemical safety. A shopper looking for a textile that is both vegan and tested for harmful substances would need to combine a vegan or fiber-content check with the Standard 100 label, since no single one of these certifications covers both questions.
Frequently asked questions
Is OEKO-TEX Standard 100 vegan?
No, OEKO-TEX Standard 100 is not a vegan certification. It tests textiles for harmful chemical substances and says nothing about fiber origin, so wool, silk, down, and other animal-derived products can carry the label. To determine vegan status, check the fiber composition label or look for a dedicated vegan certification.
What does OEKO-TEX Standard 100 actually test for?
It tests every component of a textile product for harmful substances, including formaldehyde, heavy metals, pesticides, phthalates, and certain azo dyes. The criteria catalog covers both legally regulated chemicals and some substances not yet regulated but considered potentially harmful. Limit values are reviewed and updated annually.
Does OEKO-TEX mean the fabric is organic?
No. OEKO-TEX Standard 100 does not require organic fibers and does not certify farming practices — conventionally grown cotton or synthetic fibers can be certified. Organic fiber content is covered by separate standards such as GOTS or OCS.
How can I check if an OEKO-TEX label is genuine?
Every genuine label carries a certificate number and the name of the issuing testing institute, and OEKO-TEX offers an online label check on its website where the number can be verified. Certificates are valid for one year, so an expired or unverifiable number is a warning sign.
What is the difference between OEKO-TEX and GOTS?
OEKO-TEX Standard 100 tests the finished product for harmful chemical residues, while GOTS certifies organic fiber content plus environmental and social criteria across processing. Neither one implies the other, and the two labels can appear on the same product. Neither certification verifies vegan status.
Can wool or silk products be OEKO-TEX certified?
Yes. OEKO-TEX Standard 100 certifies textiles regardless of fiber origin, so wool, silk, down, and cashmere articles are routinely certified. The label only confirms that the product passed harmful-substance testing, not that it is free of animal-derived materials.
Summary
Type
Cruelty-Free
Established
1992
Origin
International (Switzerland-based)
Scope
Textiles