If your skin is constantly red, reactive, or just perpetually annoyed — this toner is your answer. Built around 77% Houttuynia Cordata (Heartleaf) Extract, one of K-beauty's most celebrated calming ingredients, this toner was made to soothe, hydrate, and quietly strengthen your skin barrier every single day.

Heartleaf is loaded with flavonoids and polysaccharides that actively calm inflammation, fight acne-causing bacteria, and help repair a compromised skin barrier — all without fragrance, harsh alcohol, or anything irritating. Layer in Centella Asiatica for barrier repair, Panthenol (Pro-Vitamin B5) for deep hydration, and Sugarcane Extract for a gentle brightening effect, and you have a toner that does a lot without ever overwhelming your skin.

Water-light in texture, absorbs instantly, and gentle enough to use twice daily. One of the best-selling toners in Korea — and once you try it, you'll understand why.

Sul Skin note: A staple in almost every sensitive skin routine we recommend. Pairs beautifully with any actives you're introducing.