Oeko-Tex Standard 100 or Öko-Tex Standard 100 is an independent testing and certification system for textile products from all stages of production (fibres, yarns, fabrics, ready-to-use end products, including accessories) along the textile value chain.

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The label, 'Confidence in Textiles' of the product-related Oeko-Tex Standard 100 (textiles tested for harmful substances) is supplemented by the certification of environmentally friendly production facilities according to Oeko-Tex Standard 1000 and by the product label Oeko-Tex Standard 100 plus for products tested for harmful substances from environmentally friendly production.