Abstract: A pillow cover device for promoting for a user restorative sleep and minimizing sleep inertia and fatigue upon waking comprising at least one non-invasive brain stimulator for stimulation of the brain at various selected frequencies; an alarm; sensors to monitor sleep; and a microprocessor, wherein the sensors provide the microprocessor data regarding the state of sleep of the user; wherein the microprocessor calculates brain activity indicating deep sleep slow-wave activity and activates the at least one brain stimulator to emit low frequency tones.