Check into Blonde Rehab with the N0'4 Smooth & Defrizz Hair Serum formulated with a bond complex enriched with Keratin & Hyaluronic Acid, specially designed damaged blonde hair structures that is naturally thinner and more fragile. This weightless multi-benefit serum provides a hydrating veil around each hair strand, smoothing frizz and visibly restoring vibrancy for all hair types and textures. **When used with the Blonde Rehab Pre-treatment, shampoo, conditioner & serum.
