On a Weverse live, KATSEYE's Yoonchae named the one product she keeps coming back to: LANEIGE's Water Sleeping Mask. Her words say it all — she's gone through about 10 jars of it.

You put it on as the last step at night and wash it off in the morning. While you sleep, it floods the skin with moisture and locks it in, so you wake up to a plumper, dewier, better-rested complexion. The kind of overnight hydration that survives tour schedules, dry planes, and stage lights.

Ten jars deep — that's not a recommendation, that's a habit.