Schwarzkopf BC pH 4.5 Color Freeze Silver Shampoo 250ml is a subtle color-depositing shampoo that neutralizes yellow tones on very light blonde or white hair colors. Just like the other shampoos in the Color Freeze range, this product features a powerful innovation, the exclusive pH 4.5 Balancer Technology, which has a unique double action. Not only does it seal the hair cuticle, it also stabilizes and strengthens the hair matrix in order to keep the color pigments locked deep inside the hair. In order to best flatter very light hair colors, this versatile shampoo also includes subtle pigments in its composition; as they cling to the hair during the cleansing process, they create a cool, shimmering finish that helps neutralize any brassiness. In a single step, your color is revitalized and restored to its true essence! Formulated with advanced haircare technology, but without ingredients of animal origin, Color Freeze is Schwarzkopf Professional's first vegan care system