Kerastase Serum Oleo-Relax is a smoothing serum to discipline fine dry, frizzy, unmanageable hair. Its softening formula will leave hair silky smooth and more manageable whilst boasting incredible shine. Kerastase Serum Oleo-Relax is formulated with Nutri-Huile Complex and Anti-Frizz Protection formula which work to smooth and nourish your dry, frizzy, unmanageable hair. Hair will benefit from improved softness and long-lasting volume and control.