Pureology's Nanoworks Gold Shampoo is designed to deeply repair weakened and damaged hair. Its exclusive Nanoworks Gold technology penetrates the hair fiber to restore natural strength and shine. Intensely repairs damaged hair Protects against external aggressors Provides softness and shine Sulfate-free formula, gentle on the scalp HOW TO USE Apply a small amount to wet hair, gently massage to lather, then rinse thoroughly. Repeat if necessary. For best results, use with Nanoworks Gold Conditioner.