A model wears a Ralph Lauren Polo Tech shirt, which is embedded with sensors that read real-time biometric data, during a presentation in New York, August 20, 2015. The PoloTech shirt measures the wearer's heart rate and number of calories burned, and streams the information to an iPhone app designed to generate a customized workout program. The men's shirt will go on sale August 27 for $295 as part of the relaunch of Ralph Lauren’s Polo Sport line. REUTERS/Brendan McDermid