N°4 Shampoo repairs and protects hair from everyday stresses — including damaged hair, split ends, and frizz — by re-linking broken bonds. Leaves hair easier to manage, shinier and healthier with each use. N°4 is color-safe and proven to reduce breakage and strengthen all types of hair. - Size: 8.5 oz/ 250 mL N°5 Conditioner a highly-moisturizing, reparative conditioner for all hair types. Leaves hair easier to manage, shinier and healthier with each use. Protects and repairs damaged hair, split ends, and frizz by re-linking broken bonds. It is color-safe and will strengthen and leave your hair stronger than ever. - Size: 8.5 oz/ 250 mL Olaplex Professional 4-In-1 Moisture Mask owered by OLAPLEX’s patented technology, this highly concentrated reparative mask adds intense moisture while providing shine and body to treat damaged hair. 4-IN-1 Moisture Mask works quickly and efficiently to address dryness in even the most severe cases. 4-IN-1 Moisture Mask works quickly and efficiently to address dryness in even the most severe cases with professional-strength ceramides, oils, and 11 vital amino acids.