The Olaplex No. 3 Hair Perfector is a hair treatment designed to repair and restore damaged and dry hair. It is infused with the brand's patented bond-building technology, making it an ideal solution for chemically treated, heat-damaged, or over-processed hair. This product can be used as a pre-shampoo treatment and is said to transform hair, reducing frizz, split ends, and breakage. Users report improved hair health and appearance, with radiant locks that they love.