Lighter than a cream or lotion and thicker—and less concentrated—than a serum, an emulsion is like a watered-down, lightweight facial lotion.

Emulsions are often the perfect product for those with oily or combination skin, as their formulas can hydrate and moisturize the complexion and allow the skin to breathe at the same time. However, emulsions aren’t reserved for only certain skin types. If your skin needs more moisture, an emulsion can work for you too. In fact, emulsions are perfect for adding an extra layer of hydration to your routine—just remember to use a face cream on top.