In this context this paper analyses the environmental performance of a cotton yarn manufacturer using the Life Cycle Assessment(LCA) method. The study compares the environmental impacts related to the production of cotton yarn from cultivation to washing and drying, when cotton is supplied by four companies sited in four different countries (Egypt, China, India and the USA). The environmental impact of the cotton yarn production stages will be analysed in order to evaluate the percentage impact at this stage in comparison with the cultivation stage