Olaplex Hair Perfector No. 3 100ml/3.4FL.OZ.

This pre-shampoo hair treatment repairs broken bonds and reduces breakage and split ends, giving you visibly stronger hair. Formulated with the scientifically-proven OLAPLEX Bond Building Technology™, it rebuilds weak and broken disulfide bonds for healthier, stronger hair. How to Use: Apply generously to damp hair from scalp to ends. Leave on for at least 10 minutes. Then rinse, shampoo and condition as normal. Use once a week or up to three times a week for damaged hair.