OLAPLEX No. 3 Pro Size 8.5 oz & No. 0 kit. Olaplex A concentrated hair treatment that strengthens hair from within, helping to reduce breakage and improving look and feel.What it does: This at-home treatment addresses damaged and compromised hair, strengthens and protects the hair's structure and restores a healthy appearance and texture. I am a Licensed Esthetician, all items are authentic.