Cotton, one of the oldest textile fibers, continues to be one of the most used, even with the wide use of synthetic fibers as well as other natural fibers, and it still is an important material in many mattresses.
IVN stands for Internationale Verband der Naturtextilwirtschaft. The English translation is International Association Natural Textile Industry. It is a standards setting and certifying organization for textiles. Based in Germany, its mark is used by companies in German speaking nations and neighboring countries.