Infused with Keratin, each product reduces frizz and leaves hair gorgeously sleek and manageable. TRESemmé Keratin Smooth Conditioner nourishes each strand to leave hair gorgeously smooth, shiny and manageable. Formulated without sodium chloride - suitable for use after a salon keratin treatment. Gentle enough for colour treated hair. Our Philosophy. From our origins in salons, we've always had a simple vision: to create stylist-tested, salon quality products without the salon price tag, so you can experience that salon feeling every day. TRESemmé - Professional, Affordable.