Infused with patented Olaplex Bond Building technology, this highly concentrated 4-in-1 reparative mask adds shine & body while providing intense moisture to treat damage hair. Made without Sulfates, Phthalates, parabens, or gluten, vegan, color-Safe. HOW TO USE : Apply to clean, damp hair mid-length to ends. Use sparingly on the roots. Work through with fingers. Leave on for 10 minutes. Rinse fully and style as usual. Start with 2 pumps for shoulder-length hair. Use more for longer, thicker hair. Less for fine or short hair. Use weekly for best results!