Cosrx Niacinamide Serum 15 is a highly concentrated serum that combines the maximum concentration of niacinamide with the ideal ratios of synergistic ingredients for complete acne control. Cosrx Pink Charcoal Pore Refining Mask A purifying, skin-enhancing and color-changing mask to turn your self-care night into a professional spa! We offer professional spa facials to add to your home care routine. Feel the effects and see the change in less than 10 minutes. Cosrx Soothing Foaming Cleanser is a smart daily acne cleanser that provides freshness and moisture with gentle foam.