In 2009, Anke Domaske, a German microbiologist and fashion designer, introduced the Hug Shirt, a cardigan capable of detecting the wearer's mood through embedded sensors and actuators. The shirt responded to physiological signals like heart rate and body temperature, changing colors to reflect mood. Paired with a mobile app, it simulated the feeling of a hug, pioneering a blend of fashion and interactive communication that influenced the smart apparel industry.