The Sleep Shepherd Biofeedback Device is the first all-natural sleep aid that monitors your brainwaves in real time and uses a biofeedback loop to help you sleep better without drugs. The Sleep Shepherd is unique from other sleep aids in that it uses biofeedback in partnership with your brain’s natural structure to slow your brain down and guide you to sleep. The device’s Virtual Hammock Technology induces a rhythmic sensation 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. The Sleep Shepherd Sleep System is an entirely drug-free and all-natural approach to getting a better night’s sleep. The hat is made of a stretchable and breathable fabric with built-in sensors and hi-fidelity speakers.