What does the texture feel like, and does it leave a sticky finish?

It has a lightweight, watery texture that absorbs quickly and leaves a refreshed, glowing finish without stickiness.

Which skin types is it best suited to?

It’s suitable for all skin types and is especially suited to dry, dull, or dehydrated skin.

How much should I use for everyday hydration?

After cleansing and toning, apply 2–3 pumps evenly over your face.

How do I use it as a sleeping pack?

Apply it in multiple even layers over clean, dry skin before bed, then leave the layers on overnight.

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NUMBUZIN

No. 6 Deep Sleep Mask Serum

What it is: A lightweight, watery liquid serum for daily hydration that can also be layered and left on overnight as a sleeping pack.

Long-Lasting Hydration
Daily Serum + Overnight Pack
Watery, Fast-Absorbing Texture
Non-Sticky, Glowing Finish

Net weight: 50ml

No. 6 Deep Sleep Mask Serum

50ml ·$18.99 USD

Long-Lasting Hydration

Daily Serum + Overnight Pack

Watery, Fast-Absorbing Texture

Non-Sticky, Glowing Finish

Main active: Five-Form Hyaluronic Acid Complex
Intensity: Standard

PRODUCT DETAILS

Meet a lightweight serum with a second life after dark. It gives you daily hydration or an overnight sleeping-pack option, bringing sheet-mask-like moisture care into one convenient liquid format.

The feel is watery, fast-absorbing and non-sticky. It leaves skin looking refreshed and glowing, with a light finish that suits the product’s hydration-first purpose.

The formula combines 63% Iceland Glacier Water with a 5-layer hyaluronic acid complex. Together, they support intense, long-lasting hydration and help keep skin moisture balanced.

It’s suitable for all skin types and particularly suited to skin that feels dry or dehydrated, or looks dull. With overnight use, it replenishes moisture and helps tired-looking skin appear refreshed and radiant by morning.

Learn more

GOES WELL WITH

100 VITA-LIGHT Reedle Shot$9.49 USD

1025 Dokdo Eye Cream$22.99 USD

1025 Dokdo Sun Cream$18.99 USD

100 Collagen Reedle Shot Stick Pouch$9.49 USD

100 PRO CICA Reedle Shot Stick Pouches$9.49 USD

100 Reedle Shot Stick Pouch$8.09 USD

1025 Dokdo Cleanser$11.99 USD

1025 Dokdo Lotion$14.99 USD

Long-lasting hydration meets a watery, non-sticky finish, with an overnight option for fresh-looking radiance by morning.

Long-lasting hydration
Overnight radiance
Light, non-sticky finish

Key Ingredients

Translucent clear, aqua and blush gel-like forms arranged on a warm ivory surface with soft shadows.

Five-Form Hyaluronic Acid Complex

A blend of five hyaluronic acid forms that helps hydrate and soften skin while supporting moisture retention.

Niacinamide

Helps visibly brighten uneven tone and support the skin barrier.

Panthenol

Pro-vitamin B5 that helps skin hold moisture and feel softer and more comfortable.

Real Results

17.8%Immediate increase in skin hydration¹
48 hoursMoisture balance maintained for up to 48 hours²

Results published by Suunsu and NUMBUZIN. Individual results may vary.

Clear glossy serum spread across the back of a hand against a light blue background.

Concerns & Benefits

Your Concerns

1
Dehydration
When skin feels depleted, this formula focuses on long-lasting hydration and moisture balance.
2
Dullness
For dull, tired-looking skin that could use a fresher, more radiant look by morning.
3

How To Use

1For everyday nighttime care, after cleansing and toning, apply 2–3 pumps evenly over your face as the final step in your routine.
2Let it absorb, then leave it on overnight without rinsing.
3To use it as a sleeping pack, apply an even layer over clean, dry skin before bed, then add more layers.
4Leave the sleeping-pack layers on overnight.

Glass dropper releasing a bead of clear serum onto a fingertip.

Frequently asked questions

Is this a regular serum or a sleeping mask?

It’s both. Use the lightweight liquid as a daily hydrating serum, or layer it before bed as a convenient sleeping pack.

Keep learning

Customer reviews

Frequently Bought Together

Buy these products together

This itemNo. 6 Deep Sleep Mask Serum$18.99 USD

100 VITA-LIGHT Reedle Shot$9.49 USD

1025 Dokdo Eye Cream$22.99 USD

Total price: $51.47 USD

This itemNo. 6 Deep Sleep Mask Serum$18.99 USD

100 VITA-LIGHT Reedle Shot$9.49 USD

1025 Dokdo Eye Cream$22.99 USD

Total price: $51.47 USD

VT COSMETICS

100 VITA-LIGHT Reedle Shot

A jelly-like evening ampoule for brighter, more even-looking skin in single-use pouches.

2 ml × 10 pouches$9.49 USD

ROUND LAB

1025 Dokdo Eye Cream

Lightweight daily eye care for hydration, brightness and smoother-looking fine lines.

30 ml / 1.01 fl oz$22.99 USD

ROUND LAB

1025 Dokdo Sun Cream

SPF 50+ PA++++ protection in a lightweight, no-white-cast lotion.

50 ml$18.99 USD

VT COSMETICS

100 Collagen Reedle Shot Stick Pouch

Beginner-friendly texture care with moisture, firmness and a refreshing, non-sticky finish.

2 ml × 10 sachets$9.49 USD

VT COSMETICS

100 PRO CICA Reedle Shot Stick Pouches

Daily texture care with soothing hydration, one travel-friendly pouch at a time.

2 ml × 10 pouches$9.49 USD

VT COSMETICS

100 Reedle Shot Stick Pouch

A travel-size evening booster for smoother-feeling, more refined-looking skin.

2 mL × 10$8.09 USD

ROUND LAB

1025 Dokdo Cleanser

Creamy, slightly acidic foam for a comfortable cleanse

150 ml$11.99 USD

ROUND LAB

1025 Dokdo Lotion

A lightweight, unscented facial moisturizer with three forms of hyaluronic acid for lasting moisture without stickiness.

200 ml$14.99 USD

NUMBUZIN No. 6 Deep Sleep Mask Serum 50ml | Sleepy Hello

NUMBUZIN

No. 6 Deep Sleep Mask Serum

What it is: A lightweight, watery liquid serum for daily hydration that can also be layered and left on overnight as a sleeping pack.

Long-Lasting Hydration
Daily Serum + Overnight Pack
Watery, Fast-Absorbing Texture
Non-Sticky, Glowing Finish

Net weight: 50ml

No. 6 Deep Sleep Mask Serum

50ml ·$18.99 USD

Long-Lasting Hydration

Daily Serum + Overnight Pack

Watery, Fast-Absorbing Texture

Non-Sticky, Glowing Finish

Main active: Five-Form Hyaluronic Acid Complex
Intensity: Standard

PRODUCT DETAILS

The feel is watery, fast-absorbing and non-sticky. It leaves skin looking refreshed and glowing, with a light finish that suits the product’s hydration-first purpose.

The formula combines 63% Iceland Glacier Water with a 5-layer hyaluronic acid complex. Together, they support intense, long-lasting hydration and help keep skin moisture balanced.

Learn more

GOES WELL WITH

100 VITA-LIGHT Reedle Shot$9.49 USD

1025 Dokdo Eye Cream$22.99 USD

1025 Dokdo Sun Cream$18.99 USD

100 Collagen Reedle Shot Stick Pouch$9.49 USD

100 PRO CICA Reedle Shot Stick Pouches$9.49 USD

100 Reedle Shot Stick Pouch$8.09 USD

1025 Dokdo Cleanser$11.99 USD

1025 Dokdo Lotion$14.99 USD

Long-lasting hydration meets a watery, non-sticky finish, with an overnight option for fresh-looking radiance by morning.

Long-lasting hydration
Overnight radiance
Light, non-sticky finish