The so-called smart and interactive textile industry has grown significantly during the past thirty years. With the introduction of novel fibers, new fabrics, and cutting-edge processing techniques, demand for smart textile materials and their applications is expected to increase. Additionally, washable, flexible, light-weight, and strong e-textiles are in high demand. These characteristics are influenced by the initial material's characteristics, the post-treatment, and the integration methods. 
An e-textile can be created by using various surface techniques to apply a
conductive component to the surface of a textile substrate or by creating a textile substrate from metals and naturally conductive polymers and using them to create fibers, yarns, and textiles. Additionally, it is possible to include conductive filament fibers or yarns onto traditional textile substrates both during and after the creation of the textile fabric by embroidering. The complete smart textile component can be printed in 3D, layer by layer, and the idea of 4D could be crucial in elevating the prestige of smart textiles to a new level.