what it is
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.
ph balance: 6-6.5
how to use
-treat hair with olaplex no. 3 (sold separately).
-apply and massage product throughout hair.
-rinse product from hair.
-follow with olaplex no. 5 bond maintenance™ conditioner (sold separately).