We have covered plenty of cool smart shirts here in the past. HeartIn is an ECG tracking shirt that helps you maximize your workouts and catch abnormalities before they become something more serious. It measures hospital-grade ECG signals from the body thanks to fabric integrated wires and sensors and a smart module.
HeartIn lets you track aerobic load, heart rate abnormality, and recovery. It has sweat wicking properties. Its smart features last up to 24 hours on battery.[where to get it]