Olaplex No.4 Fine Shampoo & No.5 Fine Conditioner Liter Set – 1000ml Duo for Fine Hair Thickening It is the first step

It is the first step of the Nioxin System 1 three-part routine

odorBIND™ biotechnology — patented smart-release system that binds and eliminates odor-causing molecules

Nioxin 3D Styling Thickening Hair Gel gives thinning-looking hair definition

The Conditioning Cream is 99% biodegradable

Olaplex No.4 Fine Shampoo & No.5 Fine Conditioner Liter Set – 1000ml Duo for Fine Hair Thickening It is the first stepOlaplex Fine Liter Duo pairs No. 4 Fine Shampoo and No. 5 Fine Conditioner in salon size 1000ml bottles, made for fine hair. This liter duo pairs the Olaplex No. 4 Fine Shampoo and No. 5 Fine Conditioner, each in 1 liter salon size bottles for daily use or professional backbar. Formulated with patented Bond Building Technology, this duo gently cleanses, strengthens, and restores volume without weighing hair down. It is ideal for fine, fragile, or flat