The Vitamino Color Spectrum Glass Shine Serum by L'Oreal Professionnel provides instant glass shine and long-lasting luster for up to 5 washes. Enriched with 5% Alpha-Silanes, the serum forms a protective layer on the hair surface when activated by heat. The result: ultra-strong glass shine. Long-lasting frizz control for up to 72 hours. Protection against humidity up to 80%. Heat protection up to 230°C. The hair feels instantly more cared for, smoother, and softer. Pro tip: For colored hair, use the serum with the complete Vitamino Color Spectrum routine to maintain color brilliance from day one of coloring.