Get Salon quality gloss at home with the new acidic color gloss line! Redken Acidic Color Extend Shampoo and Conditioner are specifically formulated to help extend the life of colored hair. They work to gently cleanse and condition while also helping to protect the hair's pH balance. The acidic formula helps seal the hair cuticle, which can help to lock in color and prevent fading. These products are often recommended for those with colored or chemically treated hair to maintain vibrancy and shine.