Olaplex No.4 & No.5 Bond Maintenance Shampoo and Conditioner Set, 100ml ea Olaplex No. 4 Bond Maintenance Shampoo and No. 5 Bond Maintenance Conditioner duo. The products use patented bond-building technology to repair and strengthen all hair types. No. 4 shampoo gently cleanses, reduces breakage, and nourishes hair. No. 5 conditioner is a highly concentrated, reparative treatment that hydrates and strengthens hair. Both products are sulfate-free and safe for color-treated hair #haircare #shampoo #conditioner #repair