Isotonic®, America’s most trusted name in Memory Foam, features new technology that senses your body shape and weight to self-adjust to your individual body contours. This revolutionary, fast-recovery foam also features Active Air Technology™ that allows your body to rest naturally. It ensures you are not too hot during the night, and promotes natural body alignment—the way you were meant to rest. Experience the Isotonic SleepBetter mattress, and enjoy a healthier and deeper sleep.