Pure hydration without any irritation! A lightweight, fast-absorbing ampoule that delivers immediate, pure hydration even for angry, red acne skin. Pure hydration without any irritation! 42% of the Centella Asiatica extract and the Madecassoside compounds provide mild moisture for sensitive skin and effectively calm sensitive skin. What’s the difference with AC Collection Blemish Spot Clearing Serum? * COSRX AC Collection Blemish Spot Clearing Serum is used when you want to remove scars or marks left after the trouble is gone, and Hydrium Centella Aqua Soothing Ampoule can be used for active acne which requires moisturizing without irritation. Non sticky, non rich, lightweight, fast absorbing solutionEven if you layer it several times until the skin is filled with moisture, this lightweight formula absorbs quickly without a greasy or tacky feeling on the skin. This formula is even suitable for acne-prone skin types as it does not cause the pores to clog. Its light texture is suitable for all seasons including hot summers.