Olaplex No.4 Bond Maintenance Shampoo & No.5 Bond Maintenance Conditioner Bundle is a two step hair care set designed to cleanse, condition, strengthen, and improve the appearance of dry, damaged, brittle, and chemically treated hair. It is made for hair affected by colouring, bleaching, heat styling, breakage, frizz, dryness, and repeated salon treatments. Olaplex No.4 Bond Maintenance Shampoo gently removes impurities, excess oil, and product buildup while supporting the hair’s internal structure and maintaining moisture. Olaplex No.5 Bond Maintenance Conditioner follows with nourishing care that helps soften, detangle, smooth, and reduce the appearance of split ends and breakage. Both products feature Olaplex Bond Building Technology, developed to support damaged disulfide bonds within the hair and improve strength, resilience, and manageability. Used together as a regular cleansing and conditioning routine, this bundle leaves hair feeling softer, smoother, more hydrated, easier to style, and healthier looking without a heavy finish.