Now, hydration goes deep overnight. Aquasource Nuit contains revolutionary skin care technology to specifically address the overnight hydration requirement for the skin. Concentrated in Mannose, Thermal Plankton Cellular Water & P. Antarctica, a micro-organism that has the unique ability to retain water. Aquasource Nuit helps replenish skin's water reserves. Upon wakening, the skin looks beautiful & more luminous, day after day. To use: Apply in the evening after deeply cleansing the skin.