Certifications & Manufacturing Credentials
Every certification we hold, who verifies it, and exactly how to check it yourself. Proof you can audit, not logos you have to trust.
Ohzehn holds OEKO-TEX Standard 100 Class II, GRS v4.0 verified by Control Union, ZDHC and SAC membership, a PVH-accredited in-house lab, and Bureau Veritas verification. Production meets REACH, SVHC, POP, and GB 18401, and is PFAS-free by design. The four Fuzhou factories manufacture for brands including Skims, Victoria's Secret, Calvin Klein, and Tommy Hilfiger, and the same posture covers the plant-derived OHZEHN-TEX™ ingredient.
What certifications does Ohzehn hold?
Six that a $20M to $500M brand actually gets audited against, each with a verifiable number we hand over before any commercial commitment. The point of this page is not the badges. It is that you can check every one of them yourself, in the issuer's own database, without taking our word for anything.
The reason this matters is simple. A large share of factories that claim a certification cannot produce the certificate number, or the number belongs to a mill they buy from rather than to their own operation. The gap between a logo on a website and a scope certificate in your name is where most sourcing disasters live. Here is what we hold, who issues it, and what it protects on your side.
| Credential | What it covers | Issued or verified by | Why it protects your brand |
|---|---|---|---|
| OEKO-TEX Standard 100 · Class II | The finished textile tested against the harmful-substance list for direct-skin-contact apparel | OEKO-TEX (Label Check database) | Clears the chemistry audit retailers and marketplaces now run before they shelf a product |
| GRS v4.0 | Recycled-content chain of custody from input to finished goods | Control Union (Textile Exchange registry) | Lets you make a recycled claim you can actually document if a regulator asks |
| ZDHC member | Wastewater and input chemistry management at the mill | ZDHC Foundation | Covers the discharge and input-chemistry side that OEKO-TEX alone does not |
| SAC member | Higg-index environmental and social facility assessment framework | Sustainable Apparel Coalition | Speaks the exact framework larger retail buyers use to score a supplier |
| PVH-accredited testing lab | In-house lab accredited to the standard PVH requires of its suppliers | PVH Corp. (Calvin Klein, Tommy Hilfiger) | The same lab discipline major-brand supply chains demand, already in house |
| Bureau Veritas verified | Independent third-party inspection and verification | Bureau Veritas | An outside auditor in the loop, not a self-declared claim |
| Regulatory floor | REACH, SVHC, POP, GB 18401, and PFAS-free by design | Formulated in, then lab-confirmed in house | Ahead of the UK, EU, and Australian microplastic and forever-chemical rules landing now |
Which brands does Ohzehn manufacture for?
The four Fuzhou factories manufacture for brands including Skims, Victoria's Secret, Calvin Klein, and Tommy Hilfiger. Calvin Klein and Tommy Hilfiger both sit under PVH Corp., and our in-house lab is PVH-accredited, which is the compliance bar those brands hold a supplier to. Read the list for what it actually tells you, not for the logos: the chemistry control, lab discipline, and audit posture that those retailers demand of a factory is already the house standard here, before you place a single order.
That is the real reason a scaling brand cares who a factory already serves. It is not borrowed prestige. It is that a supplier already clearing a major retailer's compliance program has been forced to build the systems, and pass the audits, that a $20M to $500M brand needs the moment it lands a wholesale account or a marketplace review of its own.
How can I verify these certifications myself?
Ask for the certificate number and check it in the issuer's own database, not on the factory's website. This is the single most useful thing a founder can do in sourcing, and it takes minutes:
- OEKO-TEX: search the certificate number on the OEKO-TEX Label Check. The record shows the holder, the class, and the valid-through date.
- GRS: the scope certificate is searchable in the Textile Exchange and Control Union registries, and it should name the operation and the exact products in scope.
- Bureau Veritas: verification reports carry a report number you can confirm with the issuing office.
- PVH accreditation: this is a brand-to-supplier relationship rather than a public registry, so ask how the lab is scoped and what it is accredited to test.
If a supplier will not give you a number to check, treat that as the answer. We hand ours over before you commit to anything, because a credential you cannot verify is marketing, not proof.
What regulations and chemistry standards do you meet?
Production complies with REACH and its SVHC candidate list, POP regulations, and GB 18401, and it is PFAS-free by design. PFAS-free by design is the important phrase. It is a formulation decision made at the chemistry stage, not a fluorine-free coating swapped in at the last minute, so it holds across the finished garment instead of degrading in the wash. That posture puts a program ahead of the UK, EU, and Australian microplastic and forever-chemical rules that are landing now rather than scrambling to retrofit after they land.
What lab methods do you test to in-house?
AATCC, ISO, and GB methods, run under the same roof as production instead of shipped out and waited on. Methods on file include:
- AATCC 135 for dimensional stability (the shrinkage math that sinks a repeat customer)
- AATCC 61, 8, 15, 81, 106, and 107 for colorfastness and pH
- ASTM D4964 for stretch and recovery
- ASTM D3786 for bursting strength
Testing in the same building as knitting, dyeing, and sewing is not a convenience. It means a failed result gets caught and corrected inside the run, before the goods ship, rather than becoming a return rate you discover three months later.
How do the certifications apply to the plastic-free OHZEHN-TEX™ ingredient?
They apply in full. OHZEHN-TEX™ is a 99.5 percent plant-derived platform built on castor-oil polyamide and corn-derived stretch, and it runs through the same certified, PFAS-free, Bureau Veritas-verified pipeline as every conventional line. The plastic-free chemistry is not a separate uncertified experiment on the side. It is the same OEKO-TEX and lab posture applied to a bio-based fiber base, which means a brand moving off petroleum synthetics keeps every piece of compliance proof it already depends on. See how the ingredient works in the OHZEHN-TEX™ explainer, or how it shows up per category on the activewear, intimates, and swim pages.