Life doesn't always run smooth, but there's no reason why you hair can't. Get that silky style you crave. Don't let unruly frizz get the better of you. Use the Keratin Smooth collection to get smooth, more manageable hair for up to 48 hours*. So get ready to say so-long to frizz. The TRESemmé Keratin Smooth Shampoo was specifically formulated to leave your hair gorgeously sleek and manageable. The gentle shampoo is infused with smoothing keratin. Transform your hair with Keratin Smooth for gorgeously sleek hair, smooth and easy to style. *TRESemmé Keratin Smooth Shampoo and Conditioner system vs. non-conditioning.