L’Oréal Professionnel Xtenso Care Serum is a lightweight leave-in formula specially crafted for straightened and chemically treated hair. Designed to combat everyday hair damage, it offers a powerful triple-action defense against frizz, breakage, and dryness. The serum deeply nourishes each strand, leaving your hair feeling noticeably smoother, softer, and more manageable. It locks in moisture while adding a radiant, healthy shine without weighing down your hair. Ideal for daily styling, a few drops applied to damp or dry lengths provide effortless polish, long-lasting control, and salon-like smoothness.