The Sleep Shepherd® is the first at home sleep device that monitors your brainwaves in real time and uses a biofeedback loop to help you fall asleep quickly through the use of specially engineered tones. The hat is unique in that it works with your brain’s natural structure to slow down brain activity and guide you to sleep. The hat incorporates Virtual Hammock® Technology invented by Dr. Michael Larson. This technology induces a rhythmic sensation of side-to-side swaying by utilizing the natural workings of the brain’s auditory center. The rhythmic pulse you ‘hear’ when wearing the Sleep Shepherd® is actually your brain deciphering the difference in frequency between the two tones that are played into either ear. This natural ability, contained within our brain’s structure, creates a soothing sensation of swaying back and forth as though the wearer is in a hammock.