The Olaplex hair set includes the Olaplex No. 3 Hair Perfector Treatment, a global bestseller that reduces hair breakage and visibly strengthens it. It also includes the Olaplex No. 4 Bond Maintenance Shampoo, which protects your hair from damage, split ends, and frizz. The Olaplex No. 5 Bond Maintenance Conditioner provides a shiny, healthy finish and makes your hair stronger than ever. For styling, there's the Olaplex No. 6 Leave-In Styling Crème, a concentrated cream that keeps your hair soft and smooth for up to 72 hours. Finally, the Olaplex No. 7 Bonding Oil completes the set, a restorative oil that strengthens your hair from within and gives it beautiful shine.