Restore health and strength to damaged hair with Shu Uemura Art of Hair Ultimate Reset Serum, a reparative leave-in treatment that delivers visible, long-lasting results. Powered by CSP 50 hair oil that coats each strand in moisture and nutrients without leaving a greasy residue, the lightweight formula helps to seal split ends, smooth frizz and strengthen from the inside out. Infused with thermo-responsive SRS technology to allow the serum to be re-activated by heat styling, the treatment leaves behind soft, shiny and healthy-looking results. Suitable for very damaged hair types.