The Global Recycled Standard is broader than most buyers assume. It is (cite index="207-1">an international, voluntary, full product standard that sets requirements for third-party certification of recycled content, chain of custody, social and environmental practices and chemical restrictions, and it (cite index="205-1">applies to the full supply chain. It was (cite index="207-1">originally developed by Control Union Certifications in 2008, with ownership passed to Textile Exchange on 1 January 2011.
The common misconception is worth correcting directly: (cite index="211-1">GRS is a holistic standard that also covers social responsibility, environmental management and chemical restrictions in the production process — not merely a count of recycled material. Its stated objectives are (cite index="207-1">to define requirements to ensure accurate content claims and good working conditions, and that harmful environmental and chemical impacts are minimised.
The numbers matter because they govern your marketing copy, not just your certificate:
| Threshold | What it means |
|---|---|
| 20% recycled content | (cite index="206-1">The minimum recycled content percentage for GRS certification |
| 50% recycled content | (cite index="208-1">Recycled input should be at least 50% for the official GRS mark |
| 95–100% | (cite index="210-1">Products with 95–100% recycled content can be labelled "GRS 100" |
| RCS alternative | (cite index="206-1">RCS requires at least 5% recycled input with no processing requirements — a lighter standard covering content only |
GRS also (cite index="210-1">differentiates between post-consumer and pre-consumer recycled content, with most brands preferring post-consumer materials — a distinction worth pinning down in your specification, since the two are not equivalent in a brand story or in a retailer's scorecard.
A GRS claim is only as good as the paper trail behind it. The mechanism is the Transaction Certificate: (cite index="211-1">a TC is issued by the GRS-certified mill or supplier for each batch of rPET, confirming the recycled content, weight and chain-of-custody. The chain compounds through every processing step — (cite index="209-1">every batch of GRS-certified material enters the supply chain with a Transaction Certificate from its supplier, and as the material moves through each stage — spinning, weaving, dyeing, finishing — new TCs are generated. This paper trail is audited regularly to ensure that the volume of certified material input matches the volume of certified fabric output.
One structural requirement buyers frequently miss: the factory itself must be certified, not only the fabric mill. (cite index="212-1">The factory must itself hold a GRS scope certificate covering "manufacturing — trading" for the product category, so it can legally process and pass on certified goods. Buying GRS fabric and having it made up by an uncertified factory breaks the chain and invalidates the claim on the finished bag.
A cooler is a multi-material product, and recycled content is far easier to achieve in some layers than others. Being specific about where the recycled content sits is what separates a defensible claim from a vague one.
| Component | Recycled options | Notes |
|---|---|---|
| Shell fabric | rPET polyester — the most established route; GRS also covers recycled nylon | The easiest and largest win by weight; certified rPET base cloth is widely available |
| Coating / lamination | Recycled-content TPU is emerging; conventional coatings usually virgin | Confirm whether the certified percentage refers to the base cloth only or the coated fabric |
| Insulation foam | Recycled-content options exist but are less standardised | Verify separately; do not assume a shell claim covers the wall |
| Liner | Constrained — food-contact compliance governs first | Food-contact rules take priority over recycled content on any food-contact surface |
| Webbing, thread, trims | Recycled webbing and thread available | Small by weight but visible in a full bill of materials |
| Hardware | Limited | Usually excluded from a textile-based claim |
| Packaging | Recycled polybags and cartons | Certified separately — see the claims rule below |
The liner row deserves emphasis. On a cooler the liner is a food-contact material, so its compliance obligations come first and constrain what recycled options are usable. Recycled content on the shell of a bag whose liner meets food-contact rules is a clean position; recycled content in the food-contact layer is a question for your testing laboratory, not your marketing team. See Food Grade Soft Cooler Manufacturing Standards.
The honest answer is: marginally, and less than it used to. (cite index="210-1">GRS-certified recycled polyester may have slightly lower tenacity — 5–15% less than virgin — but comparable performance in most applications, and modern recycling technologies are rapidly closing the quality gap. For a cooler shell, where the coating and construction do much of the work, that difference is usually manageable — but it should be validated on a sample rather than assumed, particularly on high-abrasion zones such as the base.
On the environmental side, the case is real: (cite index="208-1">the recycling stage of polyester requires 59% less energy than virgin polyester.
Certified material costs more, but the shape of the premium matters more than its size. As one sourcing guide explains: (cite index="212-1">the premium is front-loaded, not linear — certification overhead (scope certificates, audits, TC administration) is largely fixed at the mill level, so at 100–500 piece programmes the per-unit uplift is at its worst, and it compresses meaningfully at volume.
The practical implication for a cooler programme: a token 300-piece sustainable capsule carries the worst possible cost structure, while committing recycled content across a repeating range spreads the fixed certification overhead far more efficiently. If sustainability is a genuine brand position rather than a one-off, the economics reward committing to it properly.
One sourcing guide catalogues the failure modes precisely, and every one of them applies to cooler bags.
(cite index="212-1">The quoted fabric is "GRS rPET," but the certified content is 30% of a blend — below the 50% label threshold the brand's marketing assumed. The fix is procedural: (cite index="212-1">pin the recycled percentage and the claim tier in the spec before sampling.
(cite index="212-1">"Ocean-bound plastic," "plastic-free packaging," "zero-waste" — copy written around aspirations rather than documentation. The discipline is uncompromising and worth adopting as a rule: (cite index="212-1">every environmental sentence on your product page should map to a document you hold; if it doesn't, delete the sentence.
(cite index="212-1">Certified fabric for the approved sample, virgin fabric in production — invisible in the finished garment, fatal to the claim. This is why batch-level Transaction Certificates matter more than a certificate seen once at the quotation stage, and why the material check belongs in incoming inspection.
A specific and easily missed point: (cite index="212-1">regardless of GRS, the fibre name on the legal composition label remains "polyester" — recycled polyester is not a separate generic fibre name under US and EU textile labelling rules. The recycled statement is an additional claim, substantiated by GRS documentation, not a replacement for the composition label.
Packaging has its own rule too: (cite index="205-1">product-related claims made on or about packaging may only be used if the packaging itself is certified, and a clear statement must identify the packaging as the certified "product" — for example, "This polybag contains 100% GRS-certified recycled polyester." Other logos and brand names must sit (cite index="205-1">at a reasonable distance from the Standard logo and claim to avoid any confusion that the claim applies to the brand or product itself.
Two forces are pushing recycled content from optional to expected. First, brand and retail customers increasingly score their suppliers formally — CSR and sustainability appear as a scored category on KPI scorecards alongside quality, delivery and operational performance, which means a supplier's material choices affect a commercial relationship, not just a marketing page. Second, certification is what makes a claim usable: (cite index="211-1">as brands switch to sustainable materials like rPET, certifications become crucial to prove authenticity and traceability, and GRS (cite index="211-1">ensures transparency and credibility, preventing greenwashing and building consumer trust.
Chemical compliance sits alongside this. GRS includes chemical restrictions, and the same direction of travel affects material choice generally — TPU is phthalate-free and recyclable, while plasticised PVC faces tightening restriction in several markets. That comparison is covered in TPU vs PVC Soft Cooler Backpacks: Which Shell to Spec.
| Certifications | GRS (Global Recycled Standard), ISO9001, BSCI, SMETA P4, HIGG, SCAN |
|---|---|
| Entity | YiFuLong Outdoor Gear Co., Ltd. — insulated bag manufacturer since 2003 |
| Sites | Dongguan, Guangdong, China + Ho Chi Minh City, Vietnam |
| Processes | 27.12 MHz high-frequency welding lines and in-house sewing lines — many builds combine both |
| Liners | Food-grade inner liners across the entire range; migration testing available by market |
| Materials | TPU-laminated and PVC shells, closed-cell EPE / XPE / EVA insulation; recycled-content options quotable on request |
| Verification | Multi-channel temperature testing for cold-hold; water-immersion testing on sealed builds; SGS or QIMA inspection welcomed |
| Terms | MOQ 300 pcs per design; samples 7–15 days; production 30–45 days; FOB Guangdong |
Because a recycled claim depends on the specific certified material used in a specific order, recycled content is quoted per programme rather than assumed across the catalogue — and the documentation that supports the claim travels with the order. If you need a defined GRS tier for a retail account, state it at the specification stage so the material can be sourced and the Transaction Certificates arranged.
Real Sealock products across form factors — the platforms a sustainable programme would be specified from:
| Image | Model | Form & build | Link |
|---|---|---|---|
|
28L Airtight-Zipper Backpack Cooler (SL-I274) | Backpack — 840D TPU, EVA core, food-grade TPU membrane, HF welded | View |
|
45L Roll-Top Backpack Cooler (SL-I270) | Backpack — 600D TPU, EVA foam, welded roll-top, UTX buckles | View |
|
Roll-Top Leakproof Soft Cooler (SL-I288) | Tote / shoulder — 20L, 840D TPU, welded roll-top, MOLLE | View |
|
Insulated Cooler Backpack, molded lid (SL-E050B) | Backpack — closed-cell EPE, molded flip lid, two sizes | View |
Q: What is GRS certification?
A: The Global Recycled Standard — an international, voluntary, full product standard covering recycled content, chain of custody, social and environmental practices and chemical restrictions across the whole supply chain. It was developed by Control Union in 2008 and has been administered by Textile Exchange since 2011. It is not only a measure of recycled content; social responsibility and chemical management are part of it.
Q: How much recycled content do I need to make a claim?
A: At least 20% for GRS certification, at least 50% to use the official GRS mark, and 95–100% to label a product "GRS 100." A lighter alternative, RCS, requires only 5% recycled input but covers content alone without the processing requirements. Decide the claim you want first, then specify the tier that supports it.
Q: How do I verify a supplier's recycled claim is real?
A: Check the GRS licence number against the Textile Exchange database rather than accepting a PDF, confirm the scope certificate covers your product category and names the invoicing entity, and require batch-level Transaction Certificates with each shipment. Counterfeit claims do circulate, and a certificate seen once at quotation stage does not prove what was used in your production run.
Q: Does the factory need to be certified, or just the fabric?
A: Both. The manufacturing site must hold its own GRS scope certificate covering the product category so it can legally process and pass on certified goods. Buying certified fabric and having it assembled by an uncertified factory breaks the chain of custody and invalidates the claim on the finished bag.
Q: Does recycled polyester perform as well as virgin?
A: Close. GRS-certified recycled polyester can show 5–15% lower tenacity than virgin but comparable performance in most applications, and the gap is narrowing. On a cooler, where coating and construction carry much of the load, it is usually manageable — but validate on a sample, especially at high-abrasion areas like the base.
Q: Can the food-contact liner be made from recycled material?
A: That is a question for your testing laboratory rather than a general answer. Food-contact compliance governs the liner first, and it constrains which recycled options are usable. The straightforward position is recycled content on the shell and trims, with a fully compliant food-grade liner — and a claim worded to say exactly that.
Planning a sustainable cooler range? Sealock (YiFuLong Outdoor Gear Co., Ltd.) is GRS certified and manufactures welded and sewn insulated bags in China and Vietnam. Tell the team the recycled tier your retail account requires and which components it must cover, and they will quote the material, arrange the documentation and sample it.
Email: info@sealock.com.hk | Phone: +86-13632981825 | Browse the range
Standard requirements, thresholds and claims rules cited here reflect publicly available certification-body and industry sources as of mid-2026; standards and labelling rules are revised periodically and requirements differ by market. This is general information, not legal or compliance advice — confirm current requirements with your certification body and verify supplier certificates through the issuing database before making public claims.
