When your hair is hard to manage, Kerastase Nutritive Oleo Relax Serum can take on the job. Kerastase Nutritive Oleo Relax Serum is the perfect serum to handle hair that is fine, as well as hair that is frizzy. When you use this serum, it can help tame your hair. Kerastase Oleo Relax Serum boosts your hair’s shine. When you use it, the volume in your hair will last longer and the hair will be smoother. Use only one pump of Kerastase Nutritive Oleo Relax Serum as you massage it through the lengths of your hair, all the way to the ends.