Smoothly does it – thanks to this targeted smoothing and refining conditioner SMOOTH.AGAIN RINSE. Created to nourish and smooth thick, coarse hair using ion-based cationic technology. Keratin Proteins mimic the structure of hair’s 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.