Olaplex No. 7No. 7 dramatically increases shine, softness, and color vibrancy while minimizing flyaways and frizz. What it is: An ultra lightweight, reparative, styling oil that increases shine, softness, and color vibrancy, while minimizing flyaways and protecting hair against heat damage. Hair Type: Straight, Wavy, Curly, and Coily Hair Texture: Fine, Medium, and Thick Hair Benefits: Protects Colors, Fights Frizz, and Provides Heat Protection Formulation: Oil