A good night’s sleep depends on more than just the right mattress and pillow. Temperature plays a major role in how well you rest. If you’ve ever tossed and turned because you were too hot or shivered under too many blankets, you know how disruptive temperature fluctuations can be. That’s where temperature-controlled beds come in. Designed to keep your sleep environment at just the right level of comfort, these innovative beds are becoming increasingly popular among people who want to optimize their sleep quality.