Revox B77 Plex Blonde Boost Shampoo is an exclusive blonde edition of the fourth step of the advanced Revox B77 hair reconstruction system. This professional-grade shampoo neutralizes unwanted yellow or brassy tones, enhancing bright blonde tones without turning hair purple or grey. Formulated to maintain optimal moisture and protein balance, it gently cleanses, fortifies and rehydrates dry, color-treated strands. Lightened hair is left luxuriously shiny, polished and easily manageable. Sulfate-free. Protects and is beneficial for all hair types. - Enhances blonde color - Rehydrates and repairs lightened hair - Neutralizes unwanted orange tones. How to use Use once a week, ideally after rinsing Revox B77 Plex Hair Perfecting Treatment from your hair. 1) Put on protective gloves. Apply a sufficient amount of shampoo to wet hair and scalp, massaging well to create a lather along the entire length. 2) Leave on for 1 to 3 minutes, depending on the desired result, then rinse with warm water. 3) Follow with Revox B77 Plex Bond Care Conditioner.