Description Olaplex No.4 Shampoo Is A System That Permanently Reproduces Damaged Bonds In Your Hair, Which Are Compromised As A Result Of Pigmentation, Heated Styling And Daily Wear. It Restores Internal Humidity Levels Thus Giving Shine And Manageability. It Gives Impetus For Fuller And Thicker Hair. It Is A Certified Product, Does Not Contain Parabens, Phthalates And Sulfates.