Hair Biology Silver Shampoo and Conditioner Set. 12.8 Fl Oz. Bottles. With Biotin Silver and Glowing for Gray or Color Treated Hair. Paraben Free. Our purple formula works to fight brassiness, correct yellow tones, and keep your hair looking strong and healthy. Shampoo and conditioner: Cleanses and removes dulling residue while replenishing your hair so your true silver tones shine through. Formulated for gray hair. Without natural UV protection, gray hair is susceptible to yellowing. Conditioner: Conditions your hair without weighing it down, leaving your hair softer and more manageable.

Conditioner: Conditions your hair without weighing it down, leaving your hair softer and more manageable. Shampoo and conditioner: Cleanses and removes dulling residue while replenishing your hair so your true silver tones shine through. Formulated for gray hair. Without natural UV protection, gray hair is susceptible to yellowing. Our purple formula works to fight brassiness, correct yellow tones, and keep your hair looking strong and healthy.