The new It Bed promises to measure your movements, mold itself to your body and offer helpful suggestions to improve your slumber. Each half of the bed is adjustable, so you and your partner can theoretically tweak the mattress without disrupting each other. While Sleep Number’s It Bed isn’t overly scientific — no brain waves here — it does keep track of more than just motion. The company says the bed contains biometric sensors that track your “heart and breathing rates, presence and restfulness” hundreds of times per second. All of that information is supposedly rolled into a series of algorithms that learn your habits and make suggestions via a connected smartphone app.