Abstract: This research aims at investigating the effects of reactive dyes on the functional performance properties of the fabrics under study. To achieve this objective, an experimental approach was employed, conducting various physical and mechanical tests, as well as evaluating the color characteristics of the reactive-dyed fabric samples. Reactive dyeing was selected due to its prevalence in wet processing, owing to several advantages. These dyes form covalent bonds with fiber molecules, resulting in superior color fastness properties. The fabric samples were produced at the spinning and weaving factories of El-Mahalla El-Kubra, the warp yearn count used was 60/2 100% cotton incorporating the following variables: - Weave structures: Plain (1/1), Twill (1/2), and 5-Harness Satin (2 count) - Weft yarn composition: 100% polyester and 50:50 cotton/polyester blend After producing the fabric samples according to specified parameters and variables, several laboratory tests were conducted, including: (Light fastness - Perspiration fastness - Wash fastness - Rubbing fastness - Color depth (K/S value) The data were statistically analyzed to examine the influence of the study variables. Key findings of the study include: • The optimal soaping agent for the reactive-dyed fabrics under investigation was Ladipur (RSK) at a concentration of 0.5 g/L. • The most effective fixative for enhancing wash fastness was Cyclanon Fix at a concentration of 0.5 g/L. In conclusion, this study presents a series of results and investigations that, through collaborative research efforts, can contribute to improving the quality of fabric dyeing processes. This advancement may ultimately enhance the competitiveness of Egyptian textile products in the global market. Keywords: Fixatives, Soap agents, Mixed fabrics, Reactive dyes