AHA BHA Toner | COSRX AHA/BHA Clarifying Treatment Toner is a gentle exfoliating toner formulated with AHA and BHA to remove dead skin cells, unclog pores, and refine skin texture. It brightens dull complexion, reduces breakouts, and promotes smoother, healthier-looking skin. Lightweight and soothing, this toner is ideal for daily use and works perfectly for oily, combination, and acne-prone skin.