Enjoy 20% OFF with code STYLE20.

Numbuzin No.6 Deep Sleep Mask Serum — overnight sleeping mask serum

Collection: Korean Sleeping Masks | Overnight Masks for Deep Hydration

Wake up to soft, replenished skin with Korean sleeping masks. Overnight masks work while you sleep, sealing in moisture and actives for deep repair. Our curated collection of sleeping masks deeply hydrates, soothes and revitalizes overnight, so you wake up to plump, glowing, refreshed skin.

What Sleeping Masks Do

Sleeping masks are the last step before bed, sealing in moisture and actives that work overnight while skin repairs — so you wake up to plump, hydrated, glowing skin.

Why Overnight Care Works

Skin repairs and absorbs best at night. An overnight mask locks in active ingredients for hours, delivering deeper hydration and results than a quick rinse-off treatment.

Shop by Concern

Target your goal: Hydration, Soothing, Glow and Barrier Repair.

Key Ingredients

Look for Hyaluronic Acid for hydration, Centella to soothe, Niacinamide for glow, and Ceramide for the barrier.

Explore More Masks

Browse the full Masks range, including Sheet Masks for a quick mid-routine boost of hydration.

How to Use

As the last step of your evening routine, apply an even layer over the face, leave on overnight, and rinse in the morning. Use 2–3 times a week or whenever skin needs a boost.

Frequently Asked Questions

What is a sleeping mask?

A sleeping (or overnight) mask is a leave-on treatment applied as the last step before bed. It seals in moisture and actives that work overnight for deep repair and hydration.

How often should I use an overnight mask?

You can use a sleeping mask 2–3 times a week, or nightly if your skin is very dry. Listen to your skin and adjust based on how it feels.

Do I rinse off a sleeping mask?

Leave the sleeping mask on overnight, then rinse it off in the morning as part of your morning cleanse, and continue with your usual daytime routine.

When do I apply a sleeping mask?

Apply a sleeping mask as the very last step of your evening routine, after serums and moisturizer, to seal everything in and work overnight.

What's the difference between a sleeping mask and a night cream?

Night creams are part of your nightly routine and absorb in, while sleeping masks form a sealing layer on top to lock in moisture and actives for intensive overnight care.