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The Global Organic Textile Standard (GOTS) is the world's leading textile standard for organically produced natural fibers such as cotton, linen or wool. GOTS defines high environmental and social requirements and covers the processing, manufacturing, packaging, labelling, trading and distribution of textiles. In addition to the ban on environmentally hazardous substances and restrictions on the accessories used (buttons, zippers, etc.), the environmental criteria also include technical quality parameters such as colour fastness and shrinkage. The social criteria are based on the key norms of the International Labour Organisation (ILO), United Nations Guiding Principles on Business and Human Rights (UNGPs) and Organization for Economic Cooperation and Development (OECD).
There are two GOTS label-grades: 'organic' requiring a minimum of 95% organic fibres and 'made with organic materials' requiring at least 70% organic fibres.
More information about GOTS can be found here https://global-standard.org/