The relationship between fabric and construction is clearly emphasized in the work of Leopold Bossert. He spent several years focusing his execution and procedures of sewing before he launched his first collection. The long period of his investigation and study made him an expert in practical applications of sewing construction and discovery of new techniques. The tools used by Leopold Bossert are mostly discarded machines from the 1950 and 1960s, originally used in various fields of industrial production, from manufacturing receptacles, to closing potato bags and finishing carpet edges. The machines were specially altered in order to work with delicate fabrics, Leopold fabricated custom parts for his needs with the hand of a retired engineer. Recently his center of interest is on renovating machines from beginning of first world war era, which allow a stitch type only one of its kind in terms of rigidity and superiority.