Penetrates and repairs the core of the hair, leaving hair smooth and manageable to the ends. A water-based hair serum to be used before treatment, as a hair introduction serum. Luxurious moisture penetrates the damaged interior of the hair, repairing damage caused by dryness, coloring, friction, etc. This is a special care treatment hair serum. It leaves hair moist and manageable to the ends, creating high-quality, smooth hair. Cosme Decorte AQ Boosting Treatment Hair Serum 12mL x 5 packets This is a sample product that arrived in December. How to use: ○ Use as a special care treatment about 2-3 times a week. ○ After shampooing, lightly drain the water, and apply 1-2 pumps directly to the hair, focusing on areas of concern. (目安: Short hair → 2 pumps, Semi-long hair → 4 pumps, Long hair → 8 pumps) ○ Leave for about 10 seconds, then without rinsing, apply your usual conditioner or treatment, and then rinse. ※ If you are concerned about damage, or if you are finishing with this product, you can add more depending on the condition of your hair. Reference Price: 200mL 5,830 yen (tax included)