The L'Oréal Professionnel Série Expert Vitamino Color Resveratrol mask for color-treated hair is enriched with resveratrol, a powerful polyphenol that protects hair from external aggressors, thereby extending the longevity and stability of the color. Boost your hair color with the Vitamino Color Resveratrol mask: it hydrates, repairs and strengthens the hair, protects the color from fading and the hair from damage, leaves a pleasant fragrance on the hair, and makes detangling easier. Apply to washed, towel-dried hair. Comb through the lengths of the hair and leave on for 1 minute. Then rinse. Use once a week.