1st on the list, which puts it at an estimated 30–80% of the formula.
Aqua (EU),Deionized Water,Distilled Water,Micromatrix Fractile AN,Onsen-Sui (JPN),Purified Water
Numbuzin
No.6 Deep Sleep Mask Serum
face serum
Numbuzin
face serum
Added Last edited
Fit by skin type
General, ingredient-based — not your personalized match.
See how this fits your skin
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Take the skin testThe Numbuzin's No.6 Deep Sleep Mask Serum is the ultimate solution for tired and dull skin. This serum-like texture mask is designed to be used overnight, allowing it to deeply hydrate and nourish your skin as you sleep. The high concentration of glacier water in its formula replenishes and revitalizes your skin, leaving you with a radiant complexion come morning.
No.6 Deep Sleep Mask Serum is a watery-light serum from Numbuzin, a brand based in Korean. The formula is built mainly around hydration and soothing. The ingredient list runs to 39 ingredients, each broken down in full below.
By its ingredient list the formula reads as very light — essentially a water-and-humectant base with little emollient weight. With almost no emollient load it should absorb quickly and finish close to matte. Hydration is handled by Butylene Glycol, Propanediol and Glycerin, humectants that pull water into the upper layers of skin rather than sealing it there.
Hydration: Very high. Ingredients that pull and hold water in the upper layers of skin, and here that comes from Butylene Glycol, Propanediol, Glycerin and Sodium Hyaluronate.
Soothing: High. Ingredients aimed at visible redness and reactivity, and here that comes from Panthenol, Niacinamide, Chlorella Vulgaris Extract and Xylitylglucoside.
Brightening: Moderate. Ingredients that act on uneven tone and post-inflammatory marks, and here that comes from Niacinamide, Dipotassium Glycyrrhizate and Tocopherol.
Barrier support: Moderate. Lipids and repair signals that support skin barrier integrity, and here that comes from Niacinamide and Panthenol.
On richness alone it suits Combination (oily) and Oily skin best, and is the least natural fit for Dry and Combination (dry) skin. Nothing in the list is flagged as a common irritant, which is a reasonable starting point for reactive skin — though a patch test is still the only way to know.
The formula contributes little or nothing on antioxidant protection, cell renewal and firmness signalling. That is not a fault — most products are not meant to do everything — but if one of those is your priority, this is not the product that will address it.
Reading the full list, the formula is fragrance-free, essential-oil-free, no drying alcohol, paraben-free, silicone-free and microplastic-free. Those claims come from the ingredient list itself, not from the packaging.
It can be used morning and evening. In a routine it goes after toner, before moisturiser. Apply to clean, dry skin and give it a minute to absorb before the next layer. Introduce one new treatment at a time so you can identify what is working.
This summary is generated from the product's ingredient list. It is not a review, it is not the brand's own marketing claims, and it does not replace advice from a dermatologist.
Drawn purely from the ingredient list
Scored on how rich or light the formula reads from its INCI order.
No ingredient in this formula carries a common-irritant flag, making it a reasonable option for reactive skin. A patch test is still recommended, as individual skin reactivity varies.
Based on the curated benefits documented for this product's ingredients.
Attracts and locks in moisture to keep skin plump and dewy
Boosts collagen and cell turnover to reduce fine lines and wrinkles
Calms redness, irritation, and inflammation for sensitive skin
Fades hyperpigmentation and evens out dark spots over time
Brightens and balances complexion for a more uniform appearance
Tightens and refines the look of enlarged pores
None of the ingredients in this formula are associated with these benefits. This is not unusual, as most products are designed to target a limited number of concerns.
The actives, UV filters and benefit-carrying ingredients in this formula, in the order they are listed.
1st on the list, which puts it at an estimated 30–80% of the formula.
Aqua (EU),Deionized Water,Distilled Water,Micromatrix Fractile AN,Onsen-Sui (JPN),Purified Water
2nd on the list, which puts it at an estimated 5–20% of the formula.
Butane-1,3-diol (CAS No. 107-88-0/ EC No. 203-529-7) (R)-(-)-butane-1,3-diol” (CAS No. 6290-03-5/ EC No. 228-532-0)
3rd on the list, which puts it at an estimated 5–20% of the formula.
1,3-dihydroxypropane
4th on the list, which puts it at an estimated 2–10% of the formula.
Glycerine ;Glycerol (INN); Glycerol (RIFM); Glycerolum (EP); Glycyl Alcohol; 1,2,3-Propanetriol; 1,2,3-Trihydroxypropane
5th on the list, which puts it at an estimated 2–10% of the formula.
Niacinamide (vitamin B3) is a gentle skincare active that repairs the skin barrier, calms redness, controls oil and evens tone at 2–5%. Official IUPAC name: **3-Pyridinecarboxamide**
7th on the list, which puts it at an estimated 1–5% of the formula.
Chlorella Vulgaris Extract is an extract of the Alga, Chlorella vulgaris, Oocystaceae
8th on the list, which puts it at an estimated 1–5% of the formula.
Xylitylglucoside
9th on the list, which puts it at an estimated 1–5% of the formula.
Hyaluronic acid, sodium, salt
10th on the list, which puts it at an estimated 1–5% of the formula.
Hydrolyzed Hyaluronic Acid is the hydrolysate of Hyaluronic Acid derived by acid, enzyme or other method of hydrolysis
11th on the list, which puts it at an estimated 1–3% of the formula.
Xylitol
12th on the list, which puts it at an estimated 1–3% of the formula.
Melia Azadirachta Leaf Extract is an extract of the leaves of the Neem Tree, Melia azadirachta L., Meliaceae
13th on the list, which puts it at an estimated 1–3% of the formula.
Melia Azadirachta Flower Extract is an extract of the flowers of the Neem Tree, Melia Azadirachta L., Meliaceae
Each axis is scored from the ingredients present and how high up the list they sit.
Ingredients that pull and hold water in the upper layers of skin
Lipids and repair signals that support skin barrier integrity
Ingredients that mop up free radicals from UV and pollution
Ingredients that moderate sebum or absorb shine
Ingredients that act on uneven tone and post-inflammatory marks
Ingredients aimed at visible redness and reactivity
Retinoids, acids and enzymes that speed surface turnover
Peptides and growth factors that signal for collagen support
"Active" here means an ingredient carrying a recorded active type or a recognised UV filter.
Solvents, emollients, texture agents and preservatives — the formula that carries the actives.
Read from the full ingredient list. A brand's own claim may differ.
Judged by the same curated rules our routine checker uses. It reads the ingredients, not the label.
Nothing in this formula belongs to a group our rules can put in conflict, so it layers freely. Order still matters — thinnest texture first.
This product is the "Treat" step.
Flags to check, not verdicts. None of this is medical advice — if you are pregnant, breastfeeding or treating a skin condition, ask a doctor.
Most ingredients do more than one job, so these counts add up to more than the 39 ingredients on the label.
Draws water into the upper layers of skin
Botanical material, usually for antioxidants or scent
Changes how skin behaves rather than how it feels
Dissolves and carries everything else
Sets the thickness, spread and stability of the formula
Binds trace metals that would otherwise spoil the formula
Sets the acidity the formula needs to work
Neutralises free radicals from UV and pollution
Softens and smooths by filling gaps between skin cells
Forms a film that slows water loss
Lifts oil and dirt, or holds oil and water together
Every ingredient on the label, in order, with what it does and roughly how much of it is likely to be there.
1st on the list, which puts it at an estimated 30–80% of the formula.
Aqua (EU),Deionized Water,Distilled Water,Micromatrix Fractile AN,Onsen-Sui (JPN),Purified Water
2nd on the list, which puts it at an estimated 5–20% of the formula.
Butane-1,3-diol (CAS No. 107-88-0/ EC No. 203-529-7) (R)-(-)-butane-1,3-diol” (CAS No. 6290-03-5/ EC No. 228-532-0)
3rd on the list, which puts it at an estimated 5–20% of the formula.
1,3-dihydroxypropane
4th on the list, which puts it at an estimated 2–10% of the formula.
Glycerine ;Glycerol (INN); Glycerol (RIFM); Glycerolum (EP); Glycyl Alcohol; 1,2,3-Propanetriol; 1,2,3-Trihydroxypropane
5th on the list, which puts it at an estimated 2–10% of the formula.
Niacinamide (vitamin B3) is a gentle skincare active that repairs the skin barrier, calms redness, controls oil and evens tone at 2–5%. Official IUPAC name: **3-Pyridinecarboxamide**
6th on the list, which puts it at an estimated 2–10% of the formula.
2,2'-[(3,3'-dichloro[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[3-oxo-N-phenylbutyramide] (CI 21090)
7th on the list, which puts it at an estimated 1–5% of the formula.
Chlorella Vulgaris Extract is an extract of the Alga, Chlorella vulgaris, Oocystaceae
8th on the list, which puts it at an estimated 1–5% of the formula.
Xylitylglucoside
9th on the list, which puts it at an estimated 1–5% of the formula.
Hyaluronic acid, sodium, salt
10th on the list, which puts it at an estimated 1–5% of the formula.
Hydrolyzed Hyaluronic Acid is the hydrolysate of Hyaluronic Acid derived by acid, enzyme or other method of hydrolysis
11th on the list, which puts it at an estimated 1–3% of the formula.
Xylitol
12th on the list, which puts it at an estimated 1–3% of the formula.
Melia Azadirachta Leaf Extract is an extract of the leaves of the Neem Tree, Melia azadirachta L., Meliaceae
13th on the list, which puts it at an estimated 1–3% of the formula.
Melia Azadirachta Flower Extract is an extract of the flowers of the Neem Tree, Melia Azadirachta L., Meliaceae
14th on the list, which puts it at an estimated 1–3% of the formula.
Coccinia Indica Fruit Extract is an extract of the fruit of Coccinia indica, Cucurbitaceae
15th on the list, which puts it at an estimated 1–3% of the formula.
Aloe Barbadensis Flower Extract is an extract of the flowers of the aloe, Aloe barbadensis, Liliaceae
16th on the list, which puts it at an estimated 1–3% of the formula.
Solanum Melogena Fruit Extract is an extract of the fruit of the Eggplant, Solanum melongena L., Solanaceae
17th on the list, which puts it at an estimated 1–3% of the formula.
Ocimum Sanctum Leaf Extract is an extract of the leaves of Ocimum sanctum, Labiatae
18th on the list, which puts it at an estimated 1–3% of the formula.
Corallina Officinalis Extract is an extract of the Alga, Corallina officinalis L., Corallinaceae
19th on the list, which puts it at an estimated 1–3% of the formula.
Curcuma Longa Root Extract is an extract of the rhizomes of the Turmeric, Curcuma longa L., Zingiberaceae
20th on the list, which puts it at an estimated 1–3% of the formula.
Hyaluronic acid
21st on the list, which puts it at an estimated 1–3% of the formula.
Poly(oxy-1,2-ethanediyl)], .alpha.,.alpha.',.alpha.''-1,2,3-propanetriyltris[.omega.-hydroxy-
22nd on the list, which puts it at an estimated 1–3% of the formula.
Butanamide, 2,4-dihydroxy-N-(3-hydroxypropyl)-3,3-dimethyl-, (2R)-; dl-Panthenol
23rd on the list, which puts it at an estimated 1–3% of the formula.
1,2-Dihydroxypentane
24th on the list, which puts it at an estimated 1–3% of the formula.
Glucose
25th on the list, which puts it at an estimated 1–3% of the formula.
Sodium 5-oxo-2-pyrrolidinecarboxylate
26th on the list, which puts it at an estimated 1–3% of the formula.
D-Xylitol, 1,4-Anhydro-
27th on the list, which puts it at an estimated 1–3% of the formula.
Fructooligosaccharides are oligosaccharides produced enzymatically from sugar beets and consist chiefly of kestose, nystose and fructosyl nystose
28th on the list, which puts it at an estimated 1–3% of the formula.
Fructose
29th on the list, which puts it at an estimated 1–3% of the formula.
1,2,3-Propanetriol, homopolymer, dodecanoates (1:1) (10 mol glycerol average molar ratio)
30th on the list, which puts it at an estimated 1–3% of the formula.
Trisodium citrate
31st on the list, which puts it at an estimated 1–3% of the formula.
.alpha.-d-Glucopyranosiduronic acid, (3.beta.,20.beta.)-20-carboxy-11-oxo-30-norolean-12-en-3-yl 2-O-.beta.-d-glucopyranuronosyl-, dipotassium salt
32nd on the list, which puts it at an estimated 1–3% of the formula.
Hyaluronic acid, sodium salt, polymer with 1,1'-sulfonylbis[ethene]
33rd on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
1,2-Propanediol, 3-(2-ethylhexyloxy)
34th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
6-Amino-9-beta-D-ribofuranosyl-9H-purine
35th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Glycosaminoglycans, hydrolyzed
36th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
2-Hydroxy-1,2,3-propanetricarboxylic acid
37th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
cis-3,7-Dimethyl-2,6-octadienyl propanoate
38th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
3,4-Dihydro-2,5,7,8-tetramethyl-2-(4,8,12-trimethyltridecyl)-2H-benzopyran-6-ol; .alpha.-tocopherol; Vitamin E
39th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Xanthan gum
Products in the same category that share this formula's distinguishing ingredients.
Medicube
Shares 12 key ingredients with No.6 Deep Sleep Mask Serum: Water, Niacinamide, Glycerin, Melia Azadirachta Leaf Extract, Melia Azadirachta Flower Extract
NEOGEN
Shares 12 key ingredients with No.6 Deep Sleep Mask Serum: Water, Panthenol, Butylene Glycol, Propanediol, Sodium Hyaluronate
NEOGEN
Shares 12 key ingredients with No.6 Deep Sleep Mask Serum: Water, Panthenol, Butylene Glycol, Propanediol, Sodium Hyaluronate
innisfree
Shares 12 key ingredients with No.6 Deep Sleep Mask Serum: Water, Propanediol, Glycerin, Niacinamide, Xylitol
Eqqualberry
Shares 12 key ingredients with No.6 Deep Sleep Mask Serum: Water, Butylene Glycol, Xylitol, Glycerin, Niacinamide
Numbuzin
Shares 12 key ingredients with No.6 Deep Sleep Mask Serum: Water, Butylene Glycol, Niacinamide, Glycerin, Panthenol
WATER, BUTYLENE GLYCOL, PROPANEDIOL, GLYCERIN, NIACINAMIDE, PIGMENT YELLOW 12, CHLORELLA VULGARIS EXTRACT, XYLITYLGLUCOSIDE, SODIUM HYALURONATE, HYDROLYZED HYALURONIC ACID, XYLITOL, MELIA AZADIRACHTA LEAF EXTRACT, MELIA AZADIRACHTA FLOWER EXTRACT, COCCINIA INDICA FRUIT EXTRACT, ALOE BARBADENSIS FLOWER EXTRACT, SOLANUM MELONGENA FRUIT EXTRACT, OCIMUM SANCTUM LEAF EXTRACT, CORALLINA OFFICINALIS EXTRACT, CURCUMA LONGA ROOT EXTRACT, HYALURONIC ACID, GLYCERETH-26, PANTHENOL, PENTYLENE GLYCOL, GLUCOSE, SODIUM PCA, ANHYDROXYLITOL, FRUCTOOLIGOSACCHARIDES, FRUCTOSE, POLYGLYCERYL-10 LAURATE, SODIUM CITRATE, DIPOTASSIUM GLYCYRRHIZATE, SODIUM HYALURONATE CROSSPOLYMER, ETHYLHEXYLGLYCERIN, ADENOSINE, HYDROLYZED GLYCOSAMINOGLYCANS, CITRIC ACID, NERYL PROPIONATE, TOCOPHEROL, XANTHAN GUM.
NIACINAMIDE, SODIUM HYALURONATE, HYDROLYZED HYALURONIC ACID, HYALURONIC ACID, PANTHENOL, SODIUM HYALURONATE CROSSPOLYMER, CITRIC ACID.
After cleansing, prep the skin with toner. Dispense an appropriate amount and apply it over your face evenly.
Judged on how rich the formula reads from its ingredient list, it suits Combination (oily), Oily skin best. It is the least natural fit for Dry, Combination (dry) skin.
No ingredient in this formula carries a common-irritant flag, making it a reasonable option for reactive skin. A patch test is still recommended, as individual skin reactivity varies.
One ingredient could feed malassezia: Polyglyceryl-10 Laurate. That describes the yeast's food supply, not a prediction that it will cause a breakout.
Nothing in this formula is on the standard pregnancy-caution list. That is not medical clearance — check anything you use daily with your doctor or midwife.
Yes. Reading the full ingredient list, this formula is fragrance-free.
No. Reading the full ingredient list, this formula is no drying alcohol.
Yes. Reading the full ingredient list, this formula is silicone-free.
No. Reading the full ingredient list, this formula is essential-oil-free.
Yes. Reading the full ingredient list, this formula is paraben-free.
It layers well with Vitamin C (L-ascorbic acid), Retinoids (retinol, retinal), AHAs (glycolic, lactic), BHA (salicylic acid), PHAs (gluconolactone), Benzoyl peroxide.
Use it morning and evening, after toner, before moisturiser.
It lists 39 ingredients, of which 7 are recorded as actives.
Numbuzin, a brand based in Korean.
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