Schwarzkopf Professional BC Bonacure pH 4.5 Color Freeze Treatment is a deeply nourishing mask formulated for color-treated hair. It helps to restore hair's optimal pH level of 4.5, sealing in color pigments to reduce color fade and increase longevity. This treatment also strengthens hair structure, leaving hair soft, smooth, and shiny. It's ideal for maintaining vibrant color while providing deep conditioning and protection against environmental damage.