NWT Briogeo Deep Conditioning Hair Mask 1.5 fl oz. Briogeo's Don't Despair, Repair! Deep Conditioning Hair Mask is clinically proven to boost hair strength, shine, and silkiness and improve the long-term health of damaged hair. This antioxidant-rich formula restores essential moisture and hydration to dry, brittle, colored, or over-processed hair. Key Ingredients Formulated with 97% naturally derived ingredients Rosehip oil B-vitamins Algae extract After shampooing, massage the mask into hair, applying evenly. Leave on for 10 minutes, then rinse. Use once per week until you see intended results. Then switch to every other week if desired.