Intensely brighten your skin and erase signs of fatigue with the Numbuzin No.5 Glutathione Vitamin Concentrated Mask. This high-performance sheet mask is a specialized, intensive treatment designed to target stubborn hyperpigmentation, dark spots, and uneven skin tone. If you are struggling with a dull, tired complexion, this mask delivers a potent dose of brightening active ingredients directly into the skin for an instant "glass skin" revival.