Smartwatches are cool, but they haven't quite lived up to the promise of wearables-that the tech would eventually disappear into the fabric of our lives. To do that, we need actual fabric. So the latest tech-enabled clothing purports to help athletes and exercisers the same way smartbands do, minus the bands: Sensors woven into the skin-hugging material track biometrics like heart rate and calorie burn and send that data to smartphone apps. Even luxury brand Ralph Lauren is hip to the trend, debuting a smart tee this fall. Sorry, shirtless runners: Clothes are the future.
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