The Oeko-Tex Standard 100 is a globally uniform testing and certification system for textile raw materials, intermediate and end products at all stages of production. Tests for harmful substances comprise tests to find substances which are prohibited or regulated by law, chemicals which are known to be harmful to health, and developing parameters which are included as a precautionary measure to safeguard health. HYT is entitled to mark successfully tested products with the Oeko-Tex label, a true mark of excellence.