The Olaplex No.3 Hair Perfector is a best-selling pre-shampoo treatment featuring the scientifically-proven Olaplex Bond Building Technology™. Enriched with a host of powerful actives, the high-performance formula helps to hydrate and smooth the hair, promoting a stronger-looking appearance. With a pH balance of 3.5-5, the weekly at-home treatment works to restore a satin-like shine and soft texture to dry, damaged hair. Simply comb the radiance-boosting Olaplex treatment through damp hair, allow it to work its magic for 10 minutes, and then follow with your usual wash routine. Hair is visibly clarified, shiny and feels velvety-smooth.