Exotech folding fins injection moulded in DuPont Hytrel thermoplastic elastomer (TPE-TPC). This version, called Eco-B, is equivalent in performance to those made from fossil feedstock, but with biomass content up to 72 % by weight. DuPont produces Hytrel Eco-B using a biomass balance approach certified by the ISCC+ (International Sustainability & Carbon Certification) standard.