TRESemmé has built a history of success in 13 countries around the world. Specially formulated with lower sulfates, TRESemme Keratin Smooth Shampoo helps restore keratin and nourishes each strand to leave hair gorgeously straighter, shinier and more manageable. When used together with Keratin Smooth Conditioner, it controls frizz for up to 48 hours and transforms your hair to be gorgeously straighter, more manageable and easy to style. Apply to wet hair, gently massage and work into a lather. For best results use after shampooing with TRESemme Keratin Smooth Shampoo.