Tandem Repeat, a leading American deeptech innovator, has introduced Sonachic—a collection of luxury basics inspired by sweater and cardigan knitting, featuring Procell™ fiber made from fermented proteins, all without relying on oil or animal products. Rooted in the same style aesthetic that positioned Tandem as a favorite at fashion shows, the brand offers elegantly designed, streamlined pieces in a neutral color scheme. Our selection includes sweaters and cardigans made from Procell™ fiber.