Current trends show an integration of everything related to fashion and technology. Technology is reshaping the textile and clothing industry in a spectacular way. Smart textiles are the result of a long journey of technology. Smart textiles have a complex of functions and properties that give more power to specialists in various fields of activity, more information in a short time. These fabrics are designed to monitor the condition of the body, to announce the detection of certain specific features of the person. Moreover, these fabrics can also function as protective clothing to protect the human body against environmental hazards. Smart textiles can transmit information about the state of the body. This paper presents information on smart textiles with applications in the development of SMART products for children. It is well known that children with certain health conditions need to monitor and accumulate data from medical investigations in order to follow the evolution of the treatment to which they are subjected. The products we propose for the examination of these patients are made of materials integrated with sensors. The functionality of developed clothing products is due to the injected sensors to detect the environment and respond appropriately to changes in the health of young patients. Fabrics are excellent tools for measuring the human senses. Data collection, processing, interpretation and storage are performed to monitor vital parameters such as body temperature, heart rate, respiration, pulse, etc. Therefore, smart textiles are the key to a new stage of progress.