Learn how to turn rebellious, unruly hair into long-lasting, sleek and soft manageable styles with Serum Oléo-Relax from Kérastase. Reduce volume and improve detangling while giving hair durable shine, smoothness and anti-frizz protection. Add incredible moisture to hair, giving it a brilliant cosmetic finish. Use while straightening, controlling unwanted volume or when going for a natural wavy look. Learn step-by-step how to achieve a volume reducing blow dry using Serum Oléo-Relax.