The Sleeping Mask
A sleeping mask, sometimes called a sleeping pack, is a leave-on treatment worn overnight as the final step of an evening routine. It seals in earlier products and delivers extended hydration while you sleep.
What it is
Unlike a rinse-off or peel-off mask, a sleeping mask is applied at the end of a nighttime routine and left on until morning, when it is washed off. Many are formulated as lightweight gels or gel-creams so they feel comfortable on the pillow. The format is strongly associated with Korean brands, which helped popularize the overnight 'pack' as a routine product rather than an occasional treatment.
How it works
A sleeping mask typically forms a breathable layer over the skin that slows water loss overnight, an occlusive effect that helps lock in the hydrating and treatment ingredients applied earlier. Combined with the body's natural overnight recovery period, the extended wear time is meant to leave skin feeling plumper and more hydrated by morning.
How to use it
Sleeping masks are generally used in place of, or layered over, a regular night moisturizer rather than alongside a competing heavy cream. Frequency varies by product and skin type, from nightly to a few times a week. Because it is the last step at night, no further sealing product is needed on top.
- A leave-on overnight treatment, washed off in the morning
- Applied as the final step of an evening routine
- Often a lightweight gel or gel-cream
- Forms an occlusive layer to reduce overnight water loss
- Popularized as a routine 'pack' by Korean brands
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💧 The Cushion Compact🧴 BB Cream🎭 The Sheet Mask🫧 Double Cleansing✨ Essence🔟 The 10-Step Routine✍️ Written & reviewed by the KoreaPlus Editorial team — dermatologist-informed, cosmetic-science researched & source-cited. Last reviewed 2026-06-21.
General educational information using cosmetic structure-function wording — not medical advice. Always patch-test new actives. © KoreaPlus.