Lavender is an essential oil that has been subject to numerous scientific studies in regards to sleep. It has been found on multiple occasions to increase the amount of slow-wave and deep-wave sleep. Lavender isn't the only essential oil we use in our pillow spray. We understand that some people find the scent of lavender too strong, so we have formulated our blend in a way that creates a more pleasant and sweet scent while maintaining the benefits of each oil.