L’Oréal Professionnel Xtenso Care Hair Serum is a professional leave-in serum specially designed for frizz-free, smooth, and manageable hair. Enriched with Pro-Keratin and Incell technology, this lightweight formula strengthens hair from within while fortifying the surface to control volume and dryness. Ideal for straightened and chemically treated hair, it delivers instant shine, softness, and long-lasting smoothness without weighing hair down. Vegan, no-rinse, and free from added sulphates and parabens, Xtenso Care is a salon-trusted hair serum for frizz control, hair repair, and silky, healthy-looking results.