Thermal Technology Designed for Use with Flat Iron Our Philosophy This range has been carefully selected for its latest technology, driven by our salon heritage we work with our stylists to deliver expert solutions from salon quality products. Why use 7 Day Keratin Smooth Heat Activated Treatment? This Heat Activated Treatment, as part of the 7 Day Smooth System, works with the heat of your flat iron to transform unruly hair into salon-smooth hair that even lasts through 3 washes.* You can easily create your style every day with less frizz and more manageability. 1-888-497-7054 Made in USA *Enjoy your gorgeous, salon-smooth hair for the week or up to 3 washes.Warnings Avoid contact with eyes. Can cause eye irritation. In case of contact with eyes, rinse thoroughly with water.