redletterdave writes: OMsignal is coming out with a line of performance-oriented athletic clothing with built-in sensors. It starts taking orders on its website Thursday, with a basic kit including a shirt and an attached module selling for $199. (By themselves, shirts will sell for between $100 and $140.) It plans to ship the shirts this summer. The shirts are a smart approach that may prove superior to both the familiar chest strap and newer, less proven technologies like the optical heart-rate monitors increasingly common in devices like the Mio Alpha and the Samsung Gear Fit. OMsignal CEO Stephane Marceau visited ReadWrite recently to show off the shirt and explain the technology and fashion sense behind it.