Rachel Bilson keeps frizz and her dry hair at bay with Kerastase Serum, it leaves her locks smooth and feeling silky soft.
Kerastase Nutritive Serum Oléo-Relax is smoothing care to discipline dry, frizzy, unmanageable hair. Controls the hair with long-lasting smoothness. Hair feels smooth, manageable and shiny. Contains Nutri-Huile Complex and Anti-Frizz Protection Formula. $34
Buy it here.