Experience moisturized and unbelievably shiny hair with Olaplex No.4 Shampoo. This reparative shampoo is formulated with Olaplex Bond Building chemistry to restore strength and moisture, resulting in radiant-looking, luxurious-feeling hair. Its inherent natural antioxidive properties promote scalp health and soothe while maintaining optimal moisture balance. Suitable for all hair types, this shampoo is free of Parabens, Sulfates, and Phthalates. For an even fuller and thicker look, pair with original Olaplex No.3.