The COSRX ***132 Ultra Perfect Hair Bonding Oil Serum*** is a high-performance hair serum designed to revitalize and protect hair from the very first application. Its lightweight formula, based on patented Peptide-132, penetrates deep into the hair shaft to restore keratin structure and strengthen the inner fibers. Hair becomes more resilient and elastic, achieving a healthy, smooth appearance. The blend of seven plant-based oils—argan, olive, camellia, jojoba, rice, macadamia, and grape—intensely nourishes, hydrates, and forms a protective layer that prevents moisture loss. Meanwhile, vitamin E shields the hair fibers from oxidative stress while adding natural shine. The silky texture absorbs instantly without leaving greasy residue, delivering a glossy, polished finish. Suitable for all hair types, the serum repairs split ends, reduces frizz, and imparts a smooth sheen even to dull or damaged hair. It can be applied before styling for heat protection or on dry hair to maintain smoothness and control throughout the day. Benefits: Restores and strengthens the hair’s inner structure Delivers a glossy, smooth finish without weighing hair down Nourishes and hydrates dry hair, maintaining softness and elasticity Protects against damage from styling and external factors Tames unruly hair and reduces frizz