Mey GmbH & Co. KG, the global manufacturer of underwear, nightwear and lingerie based in Germany, is launching the world’s first nightwear worldwide with CELLIANT® viscose, which converts body heat into energy. CELLIANT viscose is a unique combination of nature and performance. It was developed by materials science leader Hologenix®, creators of CELLIANT, a responsive textile using infrared technology, and Kelheim Fibres, the leading manufacturer of viscose specialty fibres.