there are many factors when considering the sustainability of a material. the renewability and source of a fiber, the process of how a raw fiber is turned into a textile, the impact of preparation and dyeing of the fibers, energy use in production and preparation, the working conditions of the people producing the materials, and the material's total carbon footprint, transportation between production plants, shipping to retail and consumer, how the material will be cared for and washed, the processes of repairs and updates, and what happens to it at the end of life. the indexing of the textile journeys is thus extremely complex.