A supplier says they’re certified, and that word alone tends to end the conversation. But certified for what, exactly, and to which standard? GOTS, OCS, and RCS get treated as roughly interchangeable proof of “sustainability” a lot of the time, and they’re not. Each one verifies something different, and asking for the wrong one can mean a buyer signs off on a claim that doesn’t actually cover what they thought it did.
Here’s how the three actually compare, and which one fits which sourcing situation.
GOTS Covers the Whole Chain, Not Just the Fiber
GOTS, the Global Organic Textile Standard, verifies organic fiber content, but it doesn’t stop there. It follows the product through every stage after the fiber itself, spinning, dyeing, finishing, and it holds each of those stages to environmental and social criteria as well. A GOTS label means the organic content is real, and that the processing that turned that fiber into finished yarn or fabric met a defined bar, too.
That makes GOTS the most demanding of the three to earn, and the most reassuring one for a buyer who needs to answer questions from their own customers or regulators about the full supply chain, not just the raw material.
OCS Verifies the Fiber Claim, Nothing More
OCS, the Organic Content Standard, is doing one narrower job. It confirms the organic fiber in a product is genuine and traceable from farm to finished product, full stop. It doesn’t require anything about how the dyeing or finishing was done, and it carries no social criteria at all.
This is the difference between GOTS and OCS that buyers ask about constantly: OCS tells you the organic content is real. GOTS tells you that and also that the rest of the production process met a sustainability standard. A yarn can be OCS certified and still be dyed and finished in a facility that wouldn’t pass GOTS. That’s not a flaw in OCS, it’s just a narrower scope by design.
RCS Does the Same Job as OCS, for Recycled Content
RCS, the Recycled Claim Standard, mirrors OCS but for recycled material instead of organic fiber. It verifies that recycled content in a yarn is genuine and traceable through the supply chain, without adding processing-stage environmental or social requirements. If a buyer’s main concern is confirming recycled content is real rather than greenwashed, RCS is built for exactly that question, nothing broader.
So Which One Should a Buyer Actually Ask For?
It comes down to what you’re actually trying to verify, not which certification sounds the most rigorous on paper.
If the requirement is proving organic fiber content specifically, and that’s the whole ask, OCS covers it, and it’s usually easier and faster for a mill to hold than full GOTS certification.
If the requirement includes accountability for how the yarn was processed after the fiber stage, dyeing, finishing, labor conditions, GOTS is the one that actually covers that ground. Asking for OCS when what you really need is GOTS-level assurance leaves a gap most buyers don’t realize is there until someone asks them a harder question later.
If recycled content is the claim in question, RCS verifies it directly, in the same narrower way OCS verifies organic content. For recycled material with the added processing and social requirements, that’s GRS territory instead, a related but broader standard.
Where Textile Certification Comparisons Go Wrong
The most common mistake isn’t picking the wrong certification outright; it’s assuming any certification automatically covers everything a buyer cares about. A retailer asking a mill for “organic certification” without specifying GOTS or OCS might get either, and the two aren’t equivalent. Being specific about which standard you need and why avoids discovering the gap only after a compliance audit flags it. GOTS, OCS, and RCS also aren’t the whole picture. GRS and BCI cover recycled processing and cotton farming, respectively, and we walked through how all five fit together in our earlier sustainability certification guide.
Textile Exchange manages or contributes to several of these standards directly, and their resources are a solid place to check the exact technical criteria behind any of them before you specify a requirement to a supplier.
Ask for the Certificate, Not Just the Claim
Whichever standard applies to your order, ask for the actual certificate, the specific facility it covers, and its current expiry, rather than taking a general claim of being “certified” at face value. Certifications apply to specific scopes, not to a company as a whole, and a mill holding GOTS at one facility doesn’t mean every yarn they sell carries it.
At Karotoa Green, we can tell you exactly which certification applies to which product line, and we keep our certificates current rather than letting them lapse quietly. If you need a specific standard verified before placing an order, reach out and we’ll confirm what actually applies.
