|For Outdoor-articles, Johann Müller AG is certified according to bluesign® since 2011. bluesign® certified textiles are free from harmful substances and went through a sustainable production. For the certification, all processes are analysed and emissions (exhaust air, wastewater, etc.) are checked. Energy and water consumptions are especially evaluated. A specialty of Johann Müller AG is the dyeing of polyamide yarns for mountaineering ropes. This is very critical, since the properties of the yarn defines the strength of the rope, and in an emergency the alpinist’s life depends on it. All our mountain rope dyeing are bluesign®-certified. Click here for more information about bluesign®.