This T-Shirt Will Save Your Life

Technology is being woven directly into clothing boosting workouts and spotting health risks

Your average T-shirt can't do much more than make a fashion statement. But what if it could save your life?

Companies are weaving sensors right into the fabric of so-called smart clothes to monitor a variety of personal vital signs. In the past year alone, dozens of firms have jumped into the growing field. Shane Walker, an electronics analyst with research provider IHS, estimates that worldwide sales of smart clothes will jump to $605.9 million annually by 2014, up 34.5% from 2011.

Convenience is one reason sales are surging. "We didn't want to create something where you had another gadget to...

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