http://synbioproject.tech/cpi/applications/sorona/
Sorona® is a high-performance polymer that offers a unique combination of attributes in a variety of applications. As a carpet fiber, Sorona® provides permanent stain protection in addition to softness and durability. In apparel, Sorona® contributes exceptional softness, comfort stretch and recovery, easy care and UV- and chlorine-resistance. Sorona® is currently sold in the residential carpet market by Mohawk Industries under the SmartStrand™ with DuPont™ Sorona® polymer brand. It also can be used in a variety of other applications including automotive and home furnishings, packaging and engineering thermoplastic resins. Source
Patented, bio-catalyst microorganism-facilitated fermentation produces the propanediol, which is then processed into a polymer. This polymer is then woven into fibers, which can be used for various textiles applications.