What Is Global Recycled Standard (GRS) Certification?

Global Recycled Standard (GRS) Certification Chain-of-custody and processing certification for products containing recycled materials under the Global Recycled Standard.

The Global Recycled Standard (GRS) Certification verifies that recycled input materials are tracked through a supply chain and that processing meets environmental and social requirements. The standard covers the entire chain of custody from reclaiming recycled feedstock through manufacturing, packaging and labelling. GRS focuses on three core areas: traceability of recycled content, restricted substances, and social and environmental practices at certified sites.

What The Certification Actually Covers

GRS is a product-level chain-of-custody standard. Certification typically covers the following elements at the product and site level:

• Recycled Content Verification: Confirms the percentage and origin of recycled material used in a product and ensures claims match documentation.
• Chain Of Custody: Requires either a physical segregation or a mass-balance system so recycled inputs are auditable from input to finished product.
• Restricted Substances: Controls chemicals and substances during processing so the final product meets listed restrictions.
• Environmental Management: Evaluates energy use, wastewater controls, and waste management at certified sites.
• Social Requirements: Audits working conditions, health and safety, and labour practices in line with international labour norms.

Why It Matters For Brands And Buyers

GRS provides independent verification that a product contains recycled material and that the recycling claim is backed by traceability. For brands this reduces reputational risk and supports sustainability claims used in marketing. For buyers and procurement teams, GRS simplifies supplier selection by providing a single certification that bundles content verification with environmental and social performance indicators.

How Certification Is Demonstrated

Certification is demonstrated through a combination of documented chain-of-custody records, material receipts, production records and third-party audits. Certified sites receive a certificate listing the sites and product categories covered; labelling of finished products must follow GRS guidelines so recycled content claims are accurate and not misleading.

How It Varies By Product And Supply Chain

GRS applies across fibers, yarns, textiles and other products with recycled inputs, but practical implementation varies depending on the product and manufacturing footprint. Mass-balance systems are common where physical segregation is impractical (for example, blended yarns or recycled polyester produced in large-scale chemical recycling plants). Smaller operations may maintain strict physical segregation from receipt to shipping.

Common Operational Challenges

• Documentation Burden: Maintaining accurate inbound material certificates and production records across multiple suppliers adds administrative work.
• Traceability Gaps: Informal reclaim streams or poor labelling of bales/shipments can break chain-of-custody evidence.
• Supplier Readiness: Not all suppliers understand GRS requirements; brands often need supplier training and pre-audit remediation.

Practical Example

A U.S. apparel brand sources 30% recycled polyester yarn. The dyeing and cut-and-sew factories are audited and certified to GRS. The brand uses mass-balance accounting between its yarn supplier and dye house; third-party audits reconcile material receipts, production logs and finished-goods labelling to support the 30% recycled claim.

How To Use GRS Claims In The United States

When making recycled-content claims in the U.S., follow GRS labelling rules and ensure claims align with Federal Trade Commission Green Guides. Use clear percentages, disclose whether content is pre- or post-consumer recycled, and avoid overstating environmental benefits. Proper documentation must be retained to support any public or procurement claim.

In short, the Global Recycled Standard (GRS) Certification is a chain-of-custody and processing certification that gives brands, buyers and consumers independent assurance the recycled materials and the factories that process them meet traceability, substance, environmental and social requirements.