Mask + Melting Boost = Results x 2 Stubborn areas need special attention. Our Melting Boosts are designed to work under Karuna Face Masks to intensify your skincare results and target treat where you need it most. What Is A Melting Boost? Karuna Melting Boosts feature an innovative skincare technology that bakes scientifically-formulated ingredients into a film to lock in freshness. The Melting Boost can only be activated and ingredients released when dissolved by Karuna Face Mask serum, creating a highly efficient solution and synergistic effect. Use the serum from the mask packette to position your boost Use weekly or as needed until your skin concern is resolved Karuna Women's Skin Clarifying Duo A great designer gift. Shop Karuna at Barneys New York.