Your product tag says recycled cotton, but when a retail compliance officer asks for the exact recycled content percentage and its supporting documentation, your supplier cannot produce anything beyond a general assurance. This is the moment many buyers first learn that recycled is not a self certifying word, and that GRS certification exists specifically to close this gap.
As recycled content requirements move from a nice to have into a hard line item on retailer vendor checklists across Europe and the US, understanding what GRS actually verifies, and how to confirm a supplier’s claim is genuine, has become a core part of sourcing recycled cotton responsibly.
This guide explains what the Global Recycled Standard covers, how the certification process works, and what buyers should check before trusting a recycled cotton claim.
What GRS Certification Actually Covers
GRS, short for Global Recycled Standard, is a certification developed and maintained by Textile Exchange specifically to verify recycled content in a final product along with the processing practices used to turn that recycled material into finished fabric or garments.
To qualify for GRS certification, a product must contain a minimum of 20 percent recycled material, and the certification verifies the exact recycled content percentage through a chain of custody system that traces the material from the recycling facility through every subsequent production stage. This is a meaningfully stronger claim than an unverified recycled label, since it confirms both the presence of recycled material and the accuracy of the stated percentage.
Beyond content verification, GRS also includes environmental and social criteria at processing facilities, covering chemical restrictions similar in spirit to GOTS, along with basic labor standards. This makes GRS a more comprehensive standard than its lighter counterpart, the Recycled Claim Standard, which verifies recycled content and traceability but does not include the same environmental and social processing requirements.
For cotton buyers specifically, GRS applies to both pre consumer recycled cotton, sourced from factory cutting scraps, and post consumer recycled cotton, sourced from used garments and textiles, with the certification specifying which source and what percentage applies to a given certified product.
How GRS Certification Actually Works
Understanding the mechanics of GRS certification helps buyers know what to expect when working with a certified supplier and what documentation to request.
Every facility in the supply chain handling GRS certified material, from the recycler to the spinner to the final garment manufacturer, must hold its own valid GRS certificate, since the chain of custody requirement means certification cannot skip a link in the process. If your garment manufacturer is GRS certified but sources yarn from an uncertified spinner, the finished product cannot legitimately carry a GRS claim even if the raw recycled material was genuine.
Each certified transaction generates a transaction certificate specific to that order, similar to how GOTS operates, which documents the recycled content percentage for that exact batch rather than a general statement about the supplier’s typical practices. Buyers should request this transaction certificate for their specific order, not just a general scope certificate showing the supplier holds GRS certification in principle.
Certification bodies conduct annual audits to maintain a facility’s GRS status, checking documentation, material balance records, and processing practices against the standard’s requirements. A facility with a valid GRS certificate has been through this audit process, though buyers should still confirm the certificate has not lapsed since the last audit cycle.
Why GRS Is Becoming a Requirement for European and US Brands
Regulatory and retailer pressure around verified sustainability claims has increased sharply across both markets, and GRS has become one of the primary tools brands use to meet this pressure with a credible, third party verified answer.
In the European Union, tightening rules around green claims mean an unverified recycled content statement carries real legal exposure for brands. GRS certification gives brands a documented, auditable answer when regulators or retail partners ask for evidence behind a recycled claim, which is increasingly treated as a baseline expectation rather than an optional extra for any product marketed around recycled content.
In the United States, larger retailers and e-commerce platforms have started building recycled content percentages into their own public sustainability commitments, which pushes the verification requirement down to their supplier base. A brand that cannot produce GRS documentation for a recycled claim risks losing shelf space or platform placement to a competitor who can.
This shift means buyers building a recycled cotton product line should treat GRS certification as a sourcing requirement from the start of supplier selection, rather than something to sort out after a product has already been designed and priced around an unverified recycled cotton assumption.
How to Verify a Supplier’s GRS Claim
Verification for GRS follows a similar process to GOTS, and buyers already familiar with checking organic certificates will find the steps straightforward.
Start by requesting the supplier’s scope certificate, which lists the specific products and recycled content percentages covered under their certification. Check this against Textile Exchange’s public certification database, which lists current GRS certificate holders and their certifying body, allowing a quick confirmation that the certificate is valid and has not expired.
Next, request the transaction certificate tied to your specific order once production is confirmed, which documents the exact recycled content percentage for your batch rather than a general supplier level claim. This is the document you should keep on file to support your own product level marketing claims.
Finally, ask whether every facility in the chain, from recycler to spinner to garment manufacturer, holds its own valid GRS certificate. A gap anywhere in this chain breaks the certification for the finished product, even if the raw recycled material itself was genuine, so confirming the full chain rather than just the final manufacturer protects your brand from an unsupported claim.
Conclusion
GRS certification gives buyers a genuine, verifiable answer to what has become an increasingly common question from retailers and regulators alike, exactly how much recycled material is actually in this product. Building GRS verification into your supplier selection process from the start, and checking the full chain of custody rather than just the final manufacturer, protects your brand from an unsupported recycled claim.
If you are sourcing GRS certified recycled cotton for your next collection, our team can walk you through current certificates and available blends. Request a Quote →