This Sebastian Professional Penetraitt Shampoo is designed for damaged, overstyled, and chemically treated hair. Its active rescue system penetrates the hair to repair and reconstruct its natural health, leaving it strong and silky soft. This shampoo is essential for strengthening hair and protecting it from stress caused by chemical treatments and heat damage. It is color-safe and provides deep conditioning. To use, massage into wet hair to create a lather, rinse thoroughly, and repeat if necessary.