The ONE THING Houttuynia Cordata Extract Toner is designed to soothe and calm sensitive and irritated skin, thanks to its high concentration of Houttuynia Cordata Extract which is known for its skin-soothing properties. Its mildly acidic pH of 5.4 - 5.6 makes it suitable for all skin types, including those with sensitive skin, helping to maintain the skin's natural balance.