The PoloTech Shirt from Ralph Lauren and OMsignal is a form-fitting smart shirt meant to replace wrist-worn fitness trackers like the Fitbit Charge HR. Lined with a strip of silver-based sensors, it measures heart rate, breathing, and calories burned as you work out. It then relays that data to an iOS app via a small black box transmitter—a device that snaps onto the shirt at the side, near the bicep. The concept—and design—is undeniably attractive, and the shirt works pretty much as advertised. That said, it costs a whopping $295, and comes with two big catches: It only works with iOS devices and is designed for men only.

Design and Style
The PoloTech Shirt comes in four sizes. Small measures 35 to 38 inches around the chest; medium is 38 to 40 inches; large is 40 to 42 inches, and extra large is 42 to 44 inches. I reviewed a small, since it's recommended that you size down in order to ensure the snugness necessary for the sensors inside the shirt to sit against your skin.

Once you put it on, the PoloTech shirt is tight. Really tight. The fabric, made of 70 percent polyester, 21 percent nylon, and 9 percent spandex, feels similar to a scuba suit. Thankfully, a crew neckline and short raglan sleeves with flattened seams ensure the shirt remains friction-free as you work out, while mesh at the sleeves and underarms keep it nice and breathable. That said, it's a real pain to peel off after a trying workout. 

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