What it is: A treatment that primes your hair for deeper repair while rebuilding hair bonds, strengthening and protecting.Who it's for: All hair types.What it does: Though this treatment can be used on its own, it is specifically designed to work as a two-part system with the brand's No. 3 Hair Perfector (sold separately) to help strengthen and repair damaged hair. How to use: Apply to dry hair, fully saturating each section. Let it sit for 10 minutes. Do not rinse. If applicable, apply No. 3 Hair Perfector on top and let sit for an additional 10 minutes before shampooing and conditioning hair. 5.2 oz. Sulfate-free; phthalate-free Cruelty-free Vegan Made in the USA