In today’s world, there is a growing need for functional products that provide comfort and meet specific requirements. This need can be addressed using newly developed technologies in the industrial sector. In the textile industry, finishing is an essential phase in the production process, as it improves the functionality of the final products. The application of finishes involves various process parameters, which are influenced by multiple factors. These parameters must be carefully adjusted to ensure the product meets the required quality standards for its intended use. After the finishing process is complete, it is important to evaluate the final product to confirm that the desired finish has been achieved according to the established quality standards. This assessment is necessary to ensure consumer satisfaction. Additionally, the finishing processes should be sustainable to align with the expectations of the modern textile industry. This chapter discusses the functional finishing processes and the methods used to evaluate them based on established norms and standards.