Relief for dandruff prone scalp. Dermatologist-tested for safety. Contains pyrithione zinc, a powerful dandruff-fighting ingredient. Fights and controls dandruff flaking, itching and irritation. Purifies, mositurizes and hydrates dry scalp while soothing and calming. Leaves scalp hydrated, clarified and relieved and hair shiny, light and airy. This product is available only for Salon Professionals.