Items arrived on 10/28❗️ KOSÉ Cosme Decorte AQ Boosting Treatment Hair Serum 200mL (6 bottles) The answer: "Introduction serum" for your hair. A hair serum born from the wisdom of dermatological research. Penetrates to the core of the hair with an effective water base, repairing damage. Locks in moisture within the hair, leading to smooth, manageable, and high-quality lustrous hair down to the ends. No more frizz the next morning, and a smooth, silky finish with good manageability.