From our #1 serum worldwide comes a revolutionary treatment for radiant, younger-looking skin. This skin-strengthening mask-in-oil with Chronolux™ helps lock in the power of your Advanced Night Repair Serum. Helps lock out life's aging assaults with potent anti-oxidants and skin fortifiers. The concentrated formula strengthens, nourishes and rebuilds, helping to create a virtual nighttime cocoon. Prepares skin for the day ahead by boosting its natural resistance to daily environmental assaults. Use it every night and awaken to skin that looks more healthy, renewed and radiant.