Infused with patented OLAPLEX Bond Building technology, this highly concentrated reparative mask adds shine, smoothness, and body while providing intense moisture to treat damaged hair. Benefits: Concentrated formula absorbs deeply to treat damage Doesn't weigh the hair down Contains OLAPLEX patented bond-building technology that rebuilds broken and weakened bonds For all hair types PH balanced Cruelty-free How to Use: Apply to clean, damp hair mid-length to ends and 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. Pro Tip: For the deepest repair possible at home, use with No.0 Intensive Bond Building Hair Treatment + No.3 Hair Perfector once a week or as needed. When to Use: Use weekly for best results.