Stabilize your skin barrier with Kiehl's Ultra Facial Overnight Rehydrating Mask. An intensely hydrating overnight mask that helps lock in moisture to stabilize the skin barrier. Formulated with a high concentration of 10.5% Squalane and Glacial Glycoprotein, this mask transforms from a balm to oil texture and melts into your skin. Prevent excess overnight moisture loss and treat dryness, tightness and flakiness in the skin with this hydrating mask. Wake up to nourished, healthy-looking skin. Silicone-free, Fragrance-free, Dye-free and Mineral Oil-free. Apply after cleansing. Use fingertips and work a small amount of product into a smooth consistency. Apply a healthy layer of the mask onto clean skin. Gently massage until formula melts into skin. Pat excess into skin, neck and chest. Do not rinse. Allow to work overnight. In the morning, follow your normal regime. This overnight face mask can also be used as a 15-minute treatment or a cold cream cleanser.