Using Olaplex No. 7 Bonding Oil with No. 4 Bond Maintenance Shampoo and No. 5 Conditioner creates a powerful repairing, moisturizing, and styling routine. Wash with Shampoo/Conditioner, then apply 2-3 drops of oil to damp or dry hair for heat protection, enhanced shine, and frizz control. OLAPLEX Inc.  Recommended Routine Cleanse: Use Olaplex No. 4 Bond Maintenance Shampoo to lather, strengthen, and cleanse. Condition: Apply Olaplex No. 5 Bond Maintenance Conditioner to repair, moisturize, and soften. Style with Oil: Apply a few drops of Olaplex No. 7 Bonding Oil to damp or dry hair to boost shine and minimize flyaways. Amazon.com +4Key Benefits Bond Repair: All products contain Olaplex Bond Technology to rebuild damaged disulfide bonds.Heat Protection: The oil protects against heat styling up to 450° Shine & Frizz Control: Significantly increases hair vibrancy and controls frizz for up to 72 hours. Versatility: Safe for all hair types. OLAPLEX Inc.  The oil can also be applied to dry hair throughout the day to smooth ends. OLAPLEX Inc.