![[NUMBUZIN] No.1 Pure-full Calming Herb Toner 300ml](https://cdn.shopify.com/s/files/1/0340/6076/3269/files/numbuzin-no1-calming-toner-main-balanced-1200x1700.webp?v=1788620250)
[NUMBUZIN] No.1 Pure-full Calming Herb Toner 300ml
Apply after cleansing to prepare skin for serum.
View toner →
Stock statusReady stock in Singapore
Delivery1–3 working days
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No.6 daily hydration
Deep hydration with the ease of a daily serum
Give thirsty skin a refreshing moisture boost with No.6 Deep Sleep Mask Serum. This lightweight, watery serum combines 63% Iceland Glacier Water with a five-layer Hyaluronic Acid Complex for lasting hydration and a fresh, dewy finish.
Lasting hydration63% Iceland Glacier Water and five layers of hyaluronic acid replenish dry-feeling skin.
Fresh, glowing finishQuick-absorbing moisture leaves skin dewy without a sticky layer.
Morning and nightUse before makeup or layer in your evening skincare routine.
Everyday serum careA simple hydration step for dry, dull and dehydrated skin.
Glacier water + hyaluronic acid
Replenish moisture and keep skin comfortably hydrated
63% Iceland Glacier Water and the five-layer Hyaluronic Acid Complex work together to hydrate skin through the day and night. The refreshing formula spreads easily and absorbs quickly, making daily moisture care simple.
63% Iceland Glacier Water
Replenishes moisture for dry, tight-feeling skin.
Five-layer Hyaluronic Acid Complex
Combines different forms of hyaluronic acid for lasting hydration.
Panthenol
Complements the hydrating formula for comfortable daily care.
Niacinamide
Part of the formula for a fresh, radiant-looking complexion.
Makeup prep + daily glow
A smooth, hydrated start to your routine
Use No.6 before makeup to give skin a supple, moisturised base. Its watery texture delivers hydration without a heavy or sticky finish, so skin feels fresh and looks naturally dewy.
Before makeup
Apply after toner and let the serum absorb before continuing your routine.
Fresh-looking glow
Replenish moisture when skin looks dull or feels dehydrated.
Comfort through the day
Keep skin hydrated without a rich, heavy coating.
Evening layers
Apply several light layers when your skin needs extra moisture.
Measured hydration
Immediate moisture and hydration measured through 48 hours
In a hydration assessment with 20 women, moisture measured at 0.5 mm increased by 17.89% immediately after application. Separate measurements at 2.5 mm tracked hydration immediately after use, after 24 hours and after 48 hours.
17.89% immediate increase
At 0.5 mm, the reading increased from 30.44 to 35.89 A.U.
Through 48 hours
At 2.5 mm, readings were 29.16 A.U. immediately after use, 28.38 A.U. after 24 hours and 27.87 A.U. after 48 hours.
Test details: P&K Skin Research Center; 20 women; 18 March–21 April 2022.
Moisture balance
Refresh skin that feels oily and dehydrated
Skin can feel shiny and thirsty at the same time. No.6 adds a light layer of moisture to help maintain a comfortable water-and-oil balance, with a fresh finish that fits easily into daily skincare.
Glacier water + five-layer HA
Lasting hydration in a lightweight texture
63% Iceland Glacier Water and the five-layer Hyaluronic Acid Complex deliver moisture in a fluid, watery serum that absorbs quickly. Use a light layer in the morning or build several layers at night for extra hydration, then follow with cream.
Watery textureQuick absorptionNon-sticky finishMorning + night
Updated packaging
The same No.6 serum in its new blue bottle
The blue bottle now has a white label with a large blue 6 and the name Deep Sleep Mask Serum. The packaging has changed; the formula remains the same. Some educational images show the earlier bottle.
How to use
Layer after toner, then finish with cream
Prepare
Remove makeup when needed, cleanse and apply toner.
Apply the serum
Smooth the serum over the face and gently pat until absorbed.
Add moisture as needed
For extra evening hydration, apply several light layers.
Finish your routine
Follow with cream. In the morning, finish with sunscreen before makeup.
Use morning or evening. Deep Sleep Mask Serum is a daily serum step, so it fits into both routines.
Complete Your Routine
Build your No.6 hydration routine
Pair No.6 serum with a calming toner, moisturiser and daily sun protection. Choose the steps that fit your skin.
![[NUMBUZIN] No.6 Deep Sleep Mask Serum 50ml](https://cdn.shopify.com/s/files/1/0340/6076/3269/files/numbuzin-no6-goodbye-blemish-serum-50ml-main-lock-v1.webp?v=1788593176)
Current product
[NUMBUZIN] No.6 Deep Sleep Mask Serum 50ml
Apply after toner for lightweight, lasting hydration.
View current product →![[NUMBUZIN] No.1 Pantothenic B5 Active Soothing Cream 80ml](https://cdn.shopify.com/s/files/1/0340/6076/3269/files/numbuzin-no1-pantothenic-b5-active-soothing-cream-80ml-main-lock-v1.webp?v=1788589679)
[NUMBUZIN] No.1 Pantothenic B5 Active Soothing Cream 80ml
Follow serum with cream to complete your moisturising steps.
View cream →![[NUMBUZIN] No.1 Clear Filter Sun Essence SPF50+ PA++++ 50ml](https://cdn.shopify.com/s/files/1/0340/6076/3269/files/numbuzin-no1-clear-filter-sun-main-balanced-1200x1700.webp?v=1788620390)
[NUMBUZIN] No.1 Clear Filter Sun Essence SPF50+ PA++++ 50ml
Finish your morning routine with sun protection.
View sun care →Product details
Product Specifications
- Brand
- Numbuzin
- Product
- No.6 Deep Sleep Mask Serum
- Size
- 50ml / 1.69 fl. oz.
- Texture
- Lightweight, watery serum
- Skin types
- All skin types; especially dry, dull and dehydrated skin
- Key ingredients
- 63% Iceland Glacier Water, five-layer Hyaluronic Acid Complex, Panthenol and Niacinamide
- Routine step
- After toner and before cream; morning or evening
- Origin
- Made in Korea
- Fulfilment
- Ready stock in Singapore; delivery in 1–3 working days
Full Ingredients
Water, Butylene Glycol, Propanediol, Glycerin, Niacinamide, 1,2-Hexanediol, Water, Glycereth-26, Panthenol, Pentylene Glycol, Glucose, Chlorella Vulgaris Extract, Xylitylglucoside, Sodium PCA, Anhydroxylitol, Fructooligosaccharides, Fructose, Sodium Hyaluronate, Hydrolyzed Hyaluronic Acid, Polyglyceryl-10 Laurate, Xylitol, Xanthan Gum, Sodium Citrate, Dipotassium Glycyrrhizate, Sodium Hyaluronate Crosspolymer, Ethylhexylglycerin, Adenosine, Hydrolyzed Glycosaminoglycans, Citric Acid, Benzyl Glycol, Melia Azadirachta Leaf Extract, Melia Azadirachta Flower Extract, Coccinia Indica Fruit Extract, Aloe Barbadensis Flower Extract, Solanum Melongena (Eggplant) Fruit Extract, Ocimum Sanctum Leaf Extract, Corallina Officinalis Extract, Curcuma Longa (Turmeric) Root Extract, Hyaluronic Acid, Tocopherol
Storage and Safety
For external use. Avoid direct contact with eyes. Stop use if irritation occurs. Keep the bottle closed and store away from direct sunlight and heat.
FAQ
Is No.6 a serum or an overnight mask?
No.6 Deep Sleep Mask Serum is a lightweight daily serum. Use it after toner and before cream, either in the morning or at night.
Can I use it before makeup?
Yes. Apply after toner and let it absorb before cream, sunscreen and makeup.
How do I use it when my skin feels very dry?
Apply several light layers for extra hydration, especially in your evening routine, then follow with cream.
Does it feel thick or sticky?
It has a light, watery texture that absorbs quickly and leaves a fresh, non-sticky finish.
What changed with the packaging?
The bottle now has a white label with a large blue 6. The formula is unchanged. Some educational images show the previous packaging.
What does the 17.89% result mean?
It is the immediate increase in hydration measured at 0.5 mm in the 20-person assessment. The separate 48-hour measurements were taken at 2.5 mm.
Where does sunscreen go in the routine?
In the morning, apply sunscreen after your serum and moisturiser, before makeup.