This long-lasting Hyaluronic Acid serum from Dermalogica immediately floods skin with hydration, replenishes from within, and helps prevent future hydration evaporation. Full-circle hydrating serum utilizes an enhanced form of Hyaluronic Acid to penetrate skin's surface for deep hydration and more supple, radiant skin over time. Immediately hydrates to quench dehydrated skin. Provides hydration that lasts throughout the day and beyond. Replenishes skin from within.