KOSÉ Cosme Decorté Boosting Treatment Hair Serum 200mL Product Description KOSÉ Cosme Decorté COSME DECORTE AQ Boosting Treatment Hair Serum 200mL The answer to hair: "introduction beauty serum." 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 high-quality, lustrous hair that is smooth and manageable to the ends. No more frizz the next morning, and a smooth, silky finish with good manageability. Thank you for viewing.