Solve your skin troubles while you sleep! ◎ This apply-on wait-to-dry peel-off mask pack is a hot topic in Korea these days!VT has released two lock masks that you apply at the end of your nighttime skincare routine go to bed & peel off in the morning! Each 100ml bottle offers ample use. The azelaic acid masks not only regulate sebum butalso contain ingredients for pore & skin trouble treatment making them especially recommended for combination & oily skin types. Azelaic Acid: Treats everything from irritation-resistant skin to existing skin problems; AHA & PHA: Condition dead skin cells; BHA & LHA: Treats blackheads & whiteheads.