Have you ever felt your pants tighten after a particularly hefty meal? Imagine if your belt automatically loosened along with your waistline. The Belty by French company Emiota does just that. Equiped with a tiny motor, gyroscope, and accelerometer, this “smart” belt adjusts by itself to keep users comfortable. For the healthy minded, it also has a built in pedometer and its own phone app which provides waistline trend analysis and fitness coaching.