A weekly, clinically-proven treatment that strengthens damaged hair and helps prevent future damage. This best-selling mask is formulated with rosehip oil, B-vitamins, and algae extract, which restores essential moisture and hydration to dry, brittle, colored, or over-processed hair. It is clinically-proven to boost hair strength, shine, and silkiness and improve the long-term health of damaged hair. Formulated with 97% naturally derived ingredients.