Recycling is a very broad term, as it can mean many things. It is therefore difficult to control, and to say for certain if and to which extent an item contains recycled components. The Global Recycled Standard (GRS) certification is an international, voluntary, full product standard intended for companies that are making and/or selling products with recycled content. GRS serves to verify the amount of recycled materials in a product. It applies to the full supply chain and addresses traceability, environmental principles, social requirements and labelling.