Smart textiles are textiles that can sense and react to environmental stimuli through the integration of functionalities into the textile structure. They are capable of responding to electrical, thermal, chemical, magnetic or other stimuli. Smart textiles find applications in clothing that can provide interactive reactions by sensing signals, processing information, and actuating responses. Some key application areas of smart textiles include medical care through integration of sensors for health monitoring, protective clothing that can sense and respond to threats, and shape memory textiles that can change shape when exposed to heat. Research in smart fibres and textiles is advancing applications in various fields like healthcare, defense, sports and more.