COSRX Two In One Poreless Power Liquid is an oil-fighting liquid that clears congested pores and tightens their circumference. It delivers smoother skin and diminished pore size with consistent use. Contains 0.1% BHA to clear out congestion and deep-seated dirt. It's rich in tannin to tighten enlarged pores and also features 88% willow bark extract to fight acne and kill bacteria. The liquid also helps to cool down skin temperature and tames excessive oil production. It's also gentle enough to be used with other AHA or BHA products.