Olaplex Hair Perfector No. 3 is an intensive at-home treatment designed to repair and strengthen damaged hair bonds caused by chemical, thermal, and mechanical stress. This formula utilizes Olaplex's patented single molecule technology to find, repair, and link broken disulfide bonds within the hair shaft. Regular use helps to restore the hair's integrity, resulting in smoother, stronger, and healthier-looking hair. Ideal for all hair types, especially hair that is colored, bleached, or frequently heat-styled.