The Olaplex No.3 Hair Perfector is a best-selling pre-shampoo treatment powered by scientifically-proven Olaplex Bond Building Technology. This high-performance formula hydrates and visibly smooths hair, promoting a stronger and healthier-looking appearance. With a pH balance of 3.5-5, this weekly at-home treatment restores 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 for 10 minutes, and then follow with your usual wash routine. Hair is visibly clarified, shiny, and feels velvety-smooth. It repairs damaged hair, strengthens, reduces hair breakage, and prolongs the vitality of hair color. This product is alcohol-free, fragrance-free, oil-free, paraben-free, and sulphate-free.