COSRX AHA/BHA Treatment Toner is a facial exfoliating spray designed to address whiteheads, enlarged pores, and uneven skin texture. This 150ml (5.07 fl.oz) toner combines a low-concentration blend of AHA (glycolic acid) and BHA (betaine salicylate) to gently dissolve dead skin cells and sebum buildup without over-drying. The spray format allows for even, touch-free application across the face or targeted areas, making it suitable for daily use as part of a Korean skincare routine.

Formulated with a mild, alcohol-free base, the toner also includes natural extracts such as tea tree leaf water and panthenol to soothe and hydrate the skin. The pH-balanced composition (approximately 3.8–4.2) ensures effective exfoliation while minimizing irritation. This product is intended for those with combination, oily, or blemish-prone skin types who seek regular gentle exfoliation. It is not recommended for very sensitive or compromised skin without prior patch testing.

A key advantage is its non-sticky, lightweight texture that absorbs quickly, preparing the skin for subsequent serums or moisturizers. The spray nozzle delivers a fine mist that helps reduce product waste and maintains hygiene. COSRX products are not tested on animals, and this toner is free from parabens, sulfates, and phthalates. The practical 150ml bottle offers a generous quantity at a reasonable price point, supporting long-term daily use without harsh side effects. Regular application may contribute to a clearer, smoother complexion over time, though individual results vary. This toner is a straightforward exfoliating step that can be integrated into morning or evening regimens, followed by sunscreen in daytime due to increased photosensitivity from AHAs.