This Kérastase treatment, formulated with acidic ingredients, improves hair texture. It focuses on reducing the breakage-treatment effect caused by calcium found in tap water, repairing and removing calcium to enhance the treatment's effectiveness. ✨How to use: 1. Thoroughly rinse your hair. 2. Apply one vial to your entire head of hair. 3. Leave it on for 2-3 minutes, then apply shampoo directly over it. 4. Rinse thoroughly after shampooing. 5. Follow with your preferred conditioner. Using products from the same series will be even more effective. - Quantity: Set of 15 - Contents: 15ml each - Features: Contains acidic ingredients Regular size: 250ml, ¥9130 This set contains a total of 225ml, equivalent to ¥8330. Thank you for viewing.