Olaplex No. 4 Bond Maintenance™ Shampoo,Which hair type is it good for? Straight Wavy Curly Coiled Tightly Coiled What it is: A highly moisturizing, reparative shampoo that leaves hair easy to manage, shiny, and healthier with each use. Suggested Usage: Treat hair with Olaplex No. 3 (sold separately). Apply and massage product throughout hair. Rinse product from hair. Follow with Olaplex No. 5 Bond Maintenance Conditioner (sold separately). Key benefits: Repairs and maintains bonds within