MoroccanOil Smoothing Shampoo instantly flattens frizz and detangles hair for a smooth style that lasts 72 hours. Infused with argan oil and argan butter, it restores hair's keratin structure and boosts amino acids, making hair strong and manageable. It is safe to use on color-treated hair and is paraben-free. How: Massage into wet hair and scalp, creating a lather. Rinse well.