K-Beauty Glossary
What is Sleeping Mask?
수면팩
Overnight treatment mask
Sleeping masks (also called overnight masks or sleeping packs) are leave-on treatments applied as the last step of your PM routine. They create a breathable occlusive layer that locks in all previous products while delivering their own active ingredients overnight. You wake up, rinse off, and enjoy noticeably plumper, more radiant skin. They're less intensive than sheet masks but more convenient for regular use.