This overnight brightening mask combines tranexamic acid, niacinamide, and alpha-arbutin at a total concentration of 30,000ppm to support evening skin tone and reduce the appearance of dark spots. The formula is designed for use during sleep, allowing the active ingredients to work gradually without daytime interference. Tranexamic acid helps calm visible discoloration, niacinamide supports barrier function and uniform brightness, while alpha-arbutin provides targeted care for hyperpigmentation. The lightweight, non-greasy texture absorbs comfortably without clogging pores, making it suitable for normal, combination, and oily skin types. Those with dry or sensitive skin may also benefit from the gentle, irritation-minimized formulation. Each pack contains four individual masks, each pre-soaked in concentrated essence for single-use application. The mask sheet adheres closely to the face, facilitating ingredient delivery without dripping. This product is a practical option for individuals seeking a consistent brightening routine that fits into an evening skincare regimen. It can be used two to three times per week as part of a broader skincare approach. The packaging is compact and suitable for travel or gifting. As a Korean skincare item, it reflects a formulation philosophy that balances efficacy with skin-friendly textures. No artificial fragrances or harsh additives are included. The mask is not intended to replace medical treatment for severe pigmentation concerns, but may serve as a supportive step for general complexion clarity and an even skin tone.