Olaplex No. 4 Bond Maintenance Shampoo 33.8oz K18 This lightweight leave-in formula offers

This lightweight leave-in formula offers heat protection

Moisturizing ingredients soothe and hydrate skin

BIOME Oléoactif for a balanced and strengthened microbiota

The nourishing ingredients in this shampoo protect your hair while bringing out the best in your color

Olaplex No. 4 Bond Maintenance Shampoo 33.8oz K18 This lightweight leave-in formula offersA highly moisturizing, reparative shampoo that leaves hair easy to manage, shiny and healthier with each use. N4 is color safe, sulfate free, and proven to reduce breakage and strengthen all types of hair. Directions Apply and massage product throughout hair. Start with a nickel sized amount and adjust as needed. Rinse product from hair. Follow with Olaplex N5 Bond Maintenance Conditioner (sold separately) Use every time you shampoo. Follow with No. 5