IO Serum Oil 100mL Set of 3 Addresses the unique texture of unruly hair. A serum born from a new concept. From the popular IO series. For manageable, flowing, and hydrated hair. Tames coarse hair, giving it shine, and maintains a hydrated feel. How to use: Rub an appropriate amount in your palms and apply, focusing on the ends of your hair. Contents: 100mL Price per bottle: ¥2,640 (tax included) Discounts are not available.