Some By Mi Yuja Niacin 30 Days Miracle Brightening Sleeping Mask (60g) is an overnight glow-boosting gel mask infused with Yuja extract, niacinamide, glutathione and arbutin to visibly brighten dark spots, acne marks and dull, uneven skin while you sleep. Its refreshing, lightweight texture delivers intense hydration and antioxidant care to fight daily skin stress, helping the complexion wake up smoother, clearer and more radiant. The formula also supports improved skin tone and luminosity over time, leaving the face brighter, healthier and full of fresh morning vitality with continued nightly use.