The textile industry and its post-consumer clothing are considered among the most polluting activities and products. Society's growing awareness of this problem, taken on by governments, institutions, and entities, has led companies, fashion brands and, through influence, industries, to develop sustainable and circular solutions. However, the percentage of recycling of textile and clothing waste is still very low, so one of the biggest current challenges is being able to scale these solutions. This is a difficult challenge, which requires a lot of research, similar to what is happening in the development of more environmentally friendly production processes. In this work, yarns with mechanically recycled fibers are being developed from pre-consumer textile waste, yarn scraps, dead stock yarns and waste from the cutting of making-up industries, blended with various percentages of virgin fibers. Compositions with wool and cellulose fibers are considered, due to their sustainable nature. The aim is to develop recycling, fiber blend, preparation and spinning processes to obtain the finest yarns possible, with quality parameters within allowable values, depending on the applications. The spinning processes under study are open-end and the results that are being obtained are promising by the objectives.