Smart materials can be passive or active and react to their environment. To make conductive fibers for smart garments, fibers can be coated with conductive materials like carbon or polymers, or spun with thin metallic or plastic threads. Metallic threads are very thin metal filaments produced through bundle drawing or metal sheet shaving that can be used as electrodes. Conductive inks can also be screen printed onto garments to add conductivity. Sensors for smart garments include body pressure, temperature, and pulse rate sensors, while power supply remains a challenge due to the need for batteries in clothing. Potential applications are in military, fashion, sports, work clothing, automotive, and life preservers.