Create your look every day with less frizz and more manageability with TRESemmé Keratin Smooth Up to 7 Day Smooth System Shampoo. TRESemmé 7 Day Keratin Smooth System's unique formula cares and nourishes from root to tip, ensuring the condition of your hair is not compromised. Its patented Thermal Technology works with the heat of your straighteners to produce a sleek, salon style that even lasts through washes. Salon styling results are achieved effortlessly with hair maintaining its natural movement, without leaving the hair feeling coated. Tipped as THE fast-track fix to smoother, more manageable hair, Keratin 7 Day Smooth System makes slaving over constant styling and straightening a thing of the past.