Protects and repairs damaged hair, split ends and frizz by re-linking broken bonds. A highly-moisturizing, reparative shampoo that leaves hair easy to manage, shiny and healthier with each use. Nº.4 is color-safe and proven to reduce breakage and strengthen all types of hair.

Features & Benefits:

Formulated with Olaplex Bond Building chemistry.
Restores internally and increases moisture levels to add incredible shine and manageability.
Extremely high concentrations of our patented and proven ingredients provide an incredible feel, lather, and result.
Sulfate-free, Paraben-free, Vegan, Gluten-free, Nut-free, color safe for all hair types and textures.

How To Use:

Apply to deeply penetrate and deliver strength, nourishment, and improve integrity.
Combats excessive damage with a combination of natural ingredients and unique chemistry.