OEKO-TEX STANDARD 100: What It Tells You—and What It Does Not
Share
An OEKO-TEX® STANDARD 100 label is useful precisely because its meaning is specific. It tells you that a textile article, or the components covered by its certificate, has been tested against the standard’s limits for harmful substances. It does not turn every material, production or performance question into a yes.
The short answer
OEKO-TEX® STANDARD 100 means that the certified textile has been tested for harmful substances against requirements based on its intended use. Read the label number, validity, product class, annex and article scope together. The certificate does not, by itself, prove organic origin, sustainability, Grade 6A, fabric weight, antibacterial efficacy or a beauty or medical result.
What the label establishes
- Testing has a defined framework. OEKO-TEX® says certified items are tested against a list of more than 1,000 harmful substances.
- Requirements depend on use. The more intensive the skin contact and the more sensitive the intended user, the stricter the requirements and limit values.
- The certificate has a scope. A valid number is not a blanket approval for every product a supplier or retailer sells.
- Validity matters. Product certificates are time-limited and can be renewed, expire or be withdrawn.
How to read an OEKO-TEX® record
Five fields do most of the work.
- Standard: Confirm that the record says OEKO-TEX® STANDARD 100 rather than another OEKO-TEX® programme.
- Status: Check that the certificate is currently valid in the official Label Check.
- Product class: This sets requirements according to the article’s intended use.
- Annex: STANDARD 100 may use Annex 4 or Annex 6 criteria. Annex 6 extends the framework to additional chemicals relevant to production and environmental concerns; it is still not a full sustainability certificate.
- Type of certified article: Read the recorded materials, processes, colours and accessories. This is the boundary of the public claim.
The label number is therefore not decorative copy. It is the key that lets a reader compare the marketing sentence with the official record.
What Product Class I means
OEKO-TEX® divides STANDARD 100 into four product classes. Product Class I is intended for babies and children up to three years and has the strictest requirements and limit values. Product Class II covers direct skin contact, including bed linen; Class III covers articles without direct skin contact; and Class IV covers furnishing materials.
A pillowcase can appear within a Product Class I certificate scope even when it is not sold as a baby product. The class tells you which testing requirements were applied. It does not mean “baby-grade luxury,” improve the silk’s momme, or create a cosmetic benefit.
What Siluxe’s cited record says
Siluxe cites label number 26.HCN.36686. In the official OEKO-TEX® Label Check, the record was valid when reviewed on 25 August 2026 and states:
- OEKO-TEX® STANDARD 100
- certified according to Annex 6
- Product Class I
- a listed article scope including pillowcases and pillow covers made from 100% silk, in white, piece-dyed or reactive-printed forms, with specified accessories, produced using pre-certified components
That is meaningful material evidence. It is also a bounded statement. The public scope does not say that every Siluxe product is covered, and it does not independently verify a raw-silk grade, momme weight, silver-ion efficacy percentage or any outcome for hair, skin or sleep. Those require their own evidence.
What STANDARD 100 does—and does not—answer
| Question | What the certificate can establish | What still needs separate proof |
|---|---|---|
| Was the textile tested for harmful substances? | Yes, within the current certificate’s article scope and applicable limits | Claims such as “chemical-free,” “toxin-free” or zero exposure |
| Is it organic or fully sustainable? | No conclusion from STANDARD 100 alone | Fibre origin, farming, traceability and environmental or social production claims |
| Is it premium silk? | No quality ranking for silk | Composition, raw-silk grade, momme, weave, finishing and construction |
| Is it antibacterial? | Not established by STANDARD 100 itself | The treatment identity, certificate scope and product-specific efficacy testing |
| Will it improve hair or skin? | No cosmetic or medical outcome | Claim-specific clinical or other appropriate evidence |
Why “tested for harmful substances” is better than “toxin-free”
“Toxin-free” sounds absolute, but textile certification works through defined test methods and limit values. OEKO-TEX® updates its criteria, and the applicable requirements depend on product class and certificate edition. The accurate language is therefore tested for harmful substances according to OEKO-TEX® STANDARD 100 within the certificate scope.
That wording is not weaker. It tells the reader what was tested, by which framework and within which boundary. Absolute “free from” language removes all three.
How this proof fits with other silk specifications
STANDARD 100 answers a chemical-safety question. It does not replace the composition label. It does not explain whether satin refers to a silk or synthetic fabric. It does not measure 22 momme. And it does not establish a Grade 6A raw-silk classification.
For the distinction between raw-material grading and finished-product certification, read what Grade 6A mulberry silk actually means.
A transparent silk description keeps these facts separate, then lets them work together.
A five-minute verification routine
Before relying on an OEKO-TEX® claim:
- enter the number in the official Label Check, preserving letters, punctuation and case;
- confirm the record is valid today;
- match the standard, product class and annex;
- compare the article type and material scope with the product you are viewing;
- treat any organic, sustainability, antibacterial or performance claim as a separate evidence question.
Explore the Siluxe silk collection and its stated material proof
Frequently asked questions
Does OEKO-TEX® STANDARD 100 mean a textile is chemical-free?
No. It means the certified article has met the standard’s test criteria and limit values for harmful substances within its scope. “Chemical-free” is neither technically meaningful nor the certificate’s promise.
Does STANDARD 100 mean organic or sustainable?
No. OEKO-TEX® offers other programmes for different questions. STANDARD 100 is a harmful-substance testing standard, not a complete organic, environmental or social-production certification.
Is Product Class I stronger than Product Class II?
Class I has the strictest requirements and limit values because it is intended for babies and children up to three. The class reflects intended use and testing requirements, not luxury quality.
Is an OEKO-TEX® certificate permanent?
No. Product certificates are issued for a limited period. Always check current validity and scope rather than relying on an undated image.