A Voltage Meter and Smart Fabric Swatch (IMAGE) University of Massachusetts Amherst Caption Materials chemists led by Trisha Andrew at UMass Amherst have developed a fabric that can harvest body heat to power small wearable microelectronics such as activity trackers. They produced and evaluated stretchy knitted bands of thermoelectric fabric that can generate thermo-voltages greater than 20 milliVolts when worn on the hand. Credit UMass Amherst/Andrew lab Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.