This 4-piece set includes a two-part system of pre-shampoo treatments for weekly use to repair all levels of damage and restore visibly healthier hair. It also includes convenient travel sizes of two OLAPLEX bestsellers - the shampoo and conditioner to hydrate and prevent frizz and split ends. CONTAINS: Olaplex No.0 Intense Bond Building Hair Treatment 155ml - A professional-inspired treatment that primes hair for deeper repair, rebuilds hair bonds, strengthens and protects hair integrity. Olaplex No.3 Hair Perfector 100ml - An at-home use treatment that reduces breakage and visibly strengthens hair, improving its look and feel. Helps strengthen hair and rebuild broken bonds, helping to maintain the structure, integrity, softness and shine. Olaplex No.4 Bond Maintenance Shampoo 30ml - Protects and repairs damaged hair, split ends and frizz by re-linking broken bonds. A highly nourishing, reparative shampoo that leaves hair easy to manage, shinier and healthier after each use for a salon-worthy finish! Olaplex No.5 Bond Maintenance Conditioner 30ml - Protects and repairs damaged hair, split ends and frizz by re-linking broken bonds. A highly moisturising, reparative conditioner that leaves hair easy to manage, shinier and healthier after each use for a salon-worthy finish!