Smoothly does it thanks to KEVIN.MURPHY's targeted smoothing and refining conditionerSMOOTH.AGAIN.RINSE.Created to nourish and smooth thick, coarse hair using ion-based cationictechnology, Keratin Proteins mimic the structure of hairs natural proteins to seamlessly smooth and refine where needed the most. This hardworking smoothing conditioner also provides a layer of protection to help seal split ends, and reduces the appearance of frizz.