This material is a breakthrough in sleep technology that will forever change the way you sleep. The original formula was developed in the early 1970's at NASA's Ames Research Center in an effort to relieve astronauts of the incredible g-forces experienced during lift-off. Tempur-Pedic has used this technology to create Tempur-Pedic mattress pads that automatically react to your body's weight, shape, and temperature to provide unsurpassed comfort and therapeutic support. Billions of viscoelastic memory cells conform exactly to your body, alleviating counter-pressure and promoting deep REM sleep.