With the TRESemmé Keratin Smooth Conditioner, you can deep condition your hair while also protecting it from damage, resulting in smoother hair. It helps rebuild keratin in your hair and nourishes every strand, leaving your hair straighter and shinier thanks to its lower sulphate formulation. This nourishing conditioner, infused with Keratin and light-weight Argan oil, can make your hair significantly straighter and smoother. The Keratin-Argan Oil combination hydrates and strengthens your hair while also providing it with the necessary hydration and suppleness. TRESemmé Keratin Smooth professional conditioner has a dual-action formula that can smooth and shine your hair up to 100 percent. It can be used on both naturally occurring and chemically treated hair. Used in conjunction with TRESemmé Keratin Smooth Shampoo.