The GRS is an international, voluntary set of rules for a third-party certification of recycled content, promoted by Textile Exchange.

The standard certifies the content of recycled materials in finished or semi-finished products and the compliance to minimum environmental and social criteria in the whole production chain.

In order to certify a class of product, the entire production chain must be certified, and only in case of minimum 50% of recycled content you can use the label.

According to the GRS official website, certified companies are more than 10.000 all over the world.