Sleep is vital to our health and well-being. Yet millions of us don't get the sleep we need to live healthy and productive lives. Simply listen to this clinically proven audio system at bedtime and fall asleep easily and naturally. In the deepest state of sleep your brainwave patterns change to slow frequency "Delta" waves. Dr. Jeffrey Thompson has developed unique ways to embed these Delta pulses into multilayered, 3-dimensional nature sound recordings. After a few minutes of listening, your own brainwaves naturally "lock" onto the Delta pulses and lead you easily into deep, restful sleep.