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THE fast-track fix to smoother, more manageable hair, Keratin 7 Day Smooth makes achieving long-lasting, straight hair effortless. A breakthrough in hair technology, Heat-Activated Polymers provide salon-perfect results that stay resistant to frizz for up to seven days*. The unique formula with patented Thermal Technology works with heat from your straighteners to produce a sleek style that lasts through washes, while nourishing from root to tip to ensure the condition of your hair is not compromised. *up to 3 washes

Rather than just fighting against damage, the TRESemmé 7 Day Keratin Smooth 7 Day system is designed to work with your irons and wands. The revolutionary Thermal Technology is activated by the high temperatures to help smooth tresses for 7 days or up to 3 washes. Enjoy healthy-looking hair and that just-left-the-salon feeling every day of the week. * vs leading TRESemmé shampoo