Researchers monitored sleep cycles with brain scans and found that lavender increased slow-wave sleep, instrumental for slowing heartbeat and relaxing muscles. Subjects slept more soundly on a lavender night. ... “Lavender essential oil offers calming and soothing properties that can help reduce stress.”  
This pillow mist is lavender based and works as an anxiolytic (an anxiety reliever) and as a sedative, to increase relaxation and calm, and help bring about sleep