Product Features It is a restorative mask that cares for damaged hair and provides intense moisture. Featuring patented Olaplex Bond Building technology, No. 8 Bond Intense Moisture Mask- strengthens and repairs dry-brittle hair and damaged hair bonds. It provides hair with 2 times more shine, 4 times more moisture and 6 times more smoothness. It helps the hair look more voluminous. The safety and performance of Olaplex products have been extensively tested by independent third-party laboratories in accordance with in-group industry standards. How to Use: Apply to clean and damp hair from mid-section to ends. Leave it for 10 minutes and then rinse. Style your hair as you wish. For deepest repair, use once a week or as needed with N° 0 Intensive Bond Building Hair Treatment and N°.3 Hair Perfector.