US-based deeptech innovator Tandem Repeat, a climate-positive smart textiles company, has developed Procell, a revolutionary patented fermentation microbial process that transforms proteins into valuable products, including fibres and nonwovens which are a less toxic alternative to plastics. Leading inventor and Penn State Huck Endowed Chair of Biomaterials Professor Melik Demirel simplifies the tech and his plans for the future.