Biodance Hydro Cera-Nol Real Deep Mask (box of 4) is a soothing, moisturising, nourishing mask which has been formulated for use on sensitive, irritated skin. Biodance's patented Hydro Cera-Nol ingredient effectively soothes the skin and strengthens its natural protective barrier. 50,000ppm of high-purity, mineral-rich glacial water improves the absorption of the formula's key active ingredients and forms a moisturising film on the skin. D-Panthenol calms and moisturises the skin, reducing inflammation. 5-Layer Ceramide minimises water loss whilst Oligo Hyaluronic Acid effectively hydrates the deeper layers of the skin. How to use: Overnight - apply the mask at the end of your skincare routine and leave it on overnight. Remove the mask the next morning after a good night's sleep. Daytime - after preparing the skin with toner or serum, apply the mask and leave it on for 3-4 hours or until it becomes transparent. Pro Tip - use the eyes and mouth parts of the mask on the sides of the nose, under eyes, neck, or anywhere you want additional hydration and firming.