Two in One Poreless Power Liquid by COSRX is a lightweight treatment that helps clear and tighten pores. Perfect for people who suffer from enlarged pores and pore congestion in the T-zone area or on their cheeks. Willow bark water and betaine salicylate help keep the pores clear by dissolving the sebum and dead skin cells that can get trapped inside pores. Tannin helps tighten the pores and refine skin texture.