Brighten, tone, and strengthen your hair with Olaplex N°.4P Blonde Enhancing Toning Shampoo. This ultra-concentrated purple shampoo is formulated to neutralize brassiness and yellow tones in blonde, gray, and highlighted hair, whether natural or color-treated. Unlike typical toning formulas, this shampoo features the signature Olaplex bonding technology to reduce breakage and repair damage as it cleanses. The hydrating formula is made with Coconut Oil-Derived Surfactants to provide an easy lather that leaves hair soft, hydrated, and stronger from roots to ends. It is sulfate-free, silicone-free, paraben-free, and vegan. Key Benefits: Neutralizes brassiness and yellow tones for significantly brighter hair. Strengthens hair and repairs damage using patented Olaplex technology. Hydrates and softens hair as it cleanses. Reduces breakage and is effective on blonde, gray, or highlighted hair. Sulfate-free, silicone-free, and color safe formula. How to Use: Distribute the shampoo evenly between your palms first. Apply to wet hair and lather fully. Leave on for 1–3 minutes and rinse well. For more intense toning, leave on the hair for up to 5 minutes. Use weekly or as-needed. For maximum toning results, follow with Olaplex N°.5P Blonde Enhancer™ Toning Conditioner.