No.4 Bond Maintenance Shampoo: Olaplex No.4 Bond Maintenance Shampoo uses a unique formula to restore damaged disulphide connections and strengthen breakage-prone, brittle and dry hair. It's a replenishing, restorative shampoo that's perfect for repairing hair damaged by bleaching, chemical treatments, heat styling, and colouring frequent colouring. Olaplex No.4 expertly strengthens hair and repairs damage. This radically effective shampoo is safe for use on coloured hair and will leave you with a dazzling shimmer and resilience. No.5 Bond Maintenance Conditioner: Moisturise and regenerate your hair with this fantastic formula popular for its ability to repair and hydrate like no other product. Olaplex No.5 is a renowned restorative conditioner that tackles split ends, frizz and hair damage and actively strengthens the hair in the process. Like Olaplex No.4, this formula will especially be appreciated by those whose hair has been damaged due to chemical treatments and heating styling. The conditioning element thoroughly hydrates hair for vitality and softness.