What it is? OLAPLEX® 4-IN-1 MOISTURE MASK is formulated to address the needs of all clients in need of moisture, especially those with more severe dryness and damage. It brings a new professional strength OLAPLEX treatment, unique to the Salon with elevated levels of ceramides, oils and amino acids for a luxurious post-chemical moisture service. This highly concentrated 4-IN-1 reparative mask adds shine & body while providing intense moisture & smoothness. It can be used in conjunction with the OLAPLEX Stand-Alone Treatment™ for maximum repair or applied on its own to freshly shampooed hair after a chemical service.