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Under Armour has always touted the scientific underpinnings of its sports apparel. From moisture wicking to heat trapping and everything in between, the company is quick to assert that it isn't just another athletic clothing company. But, performance enhancing shirts and pants have their limitations and, arguably, performance monitoring is a far more interesting and burgeoning field.

Read our full hands-on with the Armour39 here: http://goo.gl/IqTZB

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