Hydro-Dew Soothing and Smoothing Serum is a light, non-greasy hyaluronic acid moisturizing serum that can be used morning and night to hydrate, smooth, and calm the skin. Dry skin types can use Hydro-Dew under a barrier repair moisturizer for added hydration and anti-inflammatory benefits, while oily skin types may use Hydro-Dew on its own in place of a heavier moisturizer.