There’s a big difference between a product that smells great and a fragrance that is scientifically proven to work. At This Works, you’ll see the term ‘functional fragrance’ used a lot. This is because our fragrances have undergone multiple clinical and independent studies and have been tested using fMRI (Functional Magnetic Resonance Imaging) to prove they help you fall asleep faster, feel more relaxed, and enjoy better quality sleep. Aside from these studies, we run a panel of 750 This Works customers who test each of our products, and we won’t launch something unless 70% of chosen panelists agree ‘This Works’. We mean it when we say it’s not just our name, it’s our promise. Keep reading to discover more about the renowned Deep Sleep functional fragrance and what it can do for you and your sleep.