The Redken Color Extend Blondage Shampoo is specially formulated to maintain the vibrancy and tone of blonde, lightened, or color-treated hair. It works to gently cleanse while depositing pigment to counteract unwanted brassy or yellow tones, ensuring your color stays bright and true between salon visits. This professional-grade formula is essential for preserving cool blonde shades. Use as part of the Color Extend Blondage system for optimal anti-brass benefits and enhanced color longevity.