GRS: GRS (全球回收标准)
The Global Recycled Standard verifies recycled content, chain of custody, environmental practice and social responsibility in textile supply chains. For zippers it covers recycled polyester tape and thread, requiring transaction certificates at each stage and a minimum recycled percentage. Certified products can carry a recognised claim, and annual audits confirm compliance. Buyers should check the certification body, scope and valid period, and reconcile volumes against transaction certificates.