The Olaplex No 4 Bond Maintenance Shampoo is the ultimate reparative and protective shampoo. By re-linking broken disulphide bonds this conditioner works to repair damage caused by everyday exposure to environmental stressors. This intensive shampoo will reduce the appearance of split ends and frizz to leave hair feeling shiny, healthy and silky smooth. Suitable for all hair types, this colour-safe shampoo provides a deep cleanse whilst working to strengthen hair and eliminate flyaways. Perfect for over-coloured hair or those who want to restore hair back to its baseline condition.