Material made from protein amino acids derived from casein extracted from exhausted milk, a process that recycles industrial surpluses from the agro-food chain. Casein is extracted from the milk, which is separated from the whey and then isolated and denatured. The amino acids contained in it, combined with an innovative spinning solution, are transformed into a unique textile fibre. It is used in the production of a range of yarns and fabrics, ideal for the production of clothing and upholstery, characterized by extreme softness and silkiness.