In this article, in the production of garments from materials in the garment industry, knitted threads are processed and yarn is produced from them, and in the laboratory of the department of "spinning technology" yarns are issued up to 400, 500 and br. / m. 4 different options were obtained for testing: 30% cotton fiber + 70% cotton fiber return, 45% cotton fiber + 55% cotton fiber return, 20% cotton fiber + 80% cotton fiber return and 50% cotton fiber + 50 % cotton. the physical and mechanical properties of the yarn were determined in the “centexuz” laboratory of the Tashkent Institute of Textile and Light Industry.