Sungboon Editor
Deep Collagen CICA Teatree Soothing Mask$11.76Aqua Blue Hydration Mask
A sheet mask from Dr. Althea's Korean-market lineup. Niacinamide sits at position 4 of 25 on the brand's own ingredient list, a brightening and barrier-support active; Allantoin follows at position 9, a calming, comedolytic-adjacent skin-conditioning agent. 28g to a unit.
No reviews yet28g
$4.64 per 10 g
- Korean-market formula
- Ships from California or direct from Korea
- Korean barcode and batch code intact
- Suited to
- Dehydrated skinSensitive skinDull, uneven tone
- Helps with
- Shoppers looking for Niacinamide in a sheet maskRoutines that want Niacinamide and Allantoin in one stepFilling the sheet mask step with a Korean-market formulaAnyone who wants the Niacinamide sheet mask sold on Korean shelves
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Sungboon Editor Deep Collagen CICA Teatree Soothing MaskSungboon Editor
$11.76
ETUDE Ceramide MaskETUDE
$2.34
$17.64
- 30-day returns
- Free US shipping on orders of $100 or more
- Tracked delivery to your door
How it works
The Aqua Blue Hydration Mask is a 28g sheet mask, used after toner, in place of your serum step, in the evening. The active it is built around is Niacinamide, named fourth on its own ingredient list. The same list carries Allantoin, Adenosine and Tocopherol, so the active is not the only thing on it worth naming. How much of the Niacinamide stays on the skin, and for how long, is decided by the sheet mask format rather than by the list alone. This is the Original Korean Formula, the sheet mask Dr.Althea sells in Korea, Niacinamide and all.
Key benefits
- Niacinamide, the active this sheet mask is built around
- Allantoin and Adenosine on the same list, actives
- Tocopherol on the same list, an antioxidant
- Hydrolyzed Gardenia Florida Extract on the same list, a plant extract
- Spirulina Platensis Extract and Agave Tequilana Leaf Extract further down the same list
- Caulerpa Lentillifera Extract and Simmondsia Chinensis (Jojoba) Seed Oil further down the same list
Inside the formula
Inside the formula
Dr. Althea Aqua Blue Hydration Mask
Where does this sheet mask go in my routine?
After toner, in place of your serum step, in the evening. Toner goes on before it, and the rest of the routine goes on after you take the sheet mask off. If you are adding it to a routine you already like, give it a week on its own first, so what you see is the Niacinamide and not three changes at once.
Is this the Korean-market sheet mask or a US version?
The Korean-market one, Niacinamide and all. We match this sheet mask to its Korean barcode before it reaches the shelf, which is the check that tells you which market release you are holding.
What else is on the list besides Niacinamide?
Allantoin, Adenosine and Tocopherol. The order they are printed in on this sheet mask's panel is the order on the box, so you can see where Niacinamide sits relative to them. Further down the same panel: Hydrolyzed Gardenia Florida Extract, Spirulina Platensis Extract and Agave Tequilana Leaf Extract.
Not on the ingredient list below: fragrance or parfum, denatured or SD alcohol, essential oils, silicones, parabens, sulfate surfactants, mineral oil or petrolatum and added color.
Full INCI (24): Water, Butylene Glycol, Glycerin, Niacinamide, 1,2-Hexanediol, Arginine, Carbomer, Allantoin, Bambusa Vulgaris Water, Ethylhexylglycerin, Hydroxyethylcellulose, Polyglyceryl-10 Laurate, Xanthan Gum, Adenosine, Disodium EDTA, Maltodextrin, Hydrolyzed Gardenia Florida Extract, Spirulina Platensis Extract, Azulene, Candida Bombicola/Glucose/Methyl Rapeseedate Ferment, Simmondsia Chinensis (Jojoba) Seed Oil, Agave Tequilana Leaf Extract, Caulerpa Lentillifera Extract, Tocopherol
Ingredient list read from jolse.com on 9 September 2026.
23 of 24 explained
- Water solvent
- Water is the base almost every serum, toner and cream is built on. It dissolves the water-loving ingredients and sets how light the finished texture feels. On an INCI list it is usually first, which only means it is the largest single ingredient by weight.
- Butylene Glycol humectant
- Butylene Glycol is a small glycol that does two jobs at once: it holds water in the top layer of skin and it dissolves plant extracts and actives that plain water cannot. It also thins a formula, which is why watery Korean essences lean on it.
- Glycerin humectant
- Glycerin is the most used humectant in skincare. It draws water into the outer layer of skin and holds it there, and it is one of the very few ingredients whose hydrating effect is settled science rather than marketing. Higher amounts feel tacky, which is why it is usually blended.
- Niacinamide active
- Niacinamide is vitamin B3, and it is the most studied active in Korean formulation. It is used at roughly 2 to 5 percent for the look of uneven tone and visible pores, and it is water soluble, stable and comfortable beside almost every other active, which is why it turns up in so many lists.
- 1,2-Hexanediol humectant
- 1,2-Hexanediol is a glycol used for two reasons: it holds water like glycerin, and it makes a formula harder for microbes to live in, so less traditional preservative is needed. Korean formulas use it heavily for that second reason.
- Arginine amino acid
- Arginine is an amino acid that does two jobs here: it holds water in the outer layer of skin, and it neutralises acidic gelling agents, which is why it often stands in for a synthetic pH adjuster.
- Carbomer thickener
- Carbomer is a synthetic polymer that only gels once a base neutralises it, which is why arginine or tromethamine sits nearby on the list. It gives the clear, non-stringy gel texture a xanthan formula cannot reach.
- Allantoin active
- Allantoin is a comfrey-derived compound used to condition skin and soften the outer layer so it feels smoother. It is one of the standard additions to a formula built for easily irritated skin.
- Bambusa Vulgaris Water plant extract
- Bamboo water, the sap or leaf distillate of bamboo, used in place of plain water. It carries silica and minerals and is a dilute base ingredient.
- Ethylhexylglycerin preservative booster
- Ethylhexylglycerin softens skin and boosts a preservative system, which is why it is nearly always sitting beside phenoxyethanol or 1,2-hexanediol. It also cuts down the odour bacteria produce, so it turns up in deodorising products.
- Hydroxyethylcellulose thickener
- Hydroxyethylcellulose is a cellulose thickener that builds a clear, smooth gel and holds the rest of the formula in suspension.
- Polyglyceryl-10 Laurate emulsifier
- Polyglyceryl-10 Laurate is a sugar-derived emulsifier and solubiliser, mild enough to be a standard choice in Korean essences. It dissolves small amounts of oil into water without any tightening feel.
11 more explained
- Xanthan Gum thickener
- Xanthan Gum is a polysaccharide made by fermenting sugar. It thickens a watery formula into a gel and holds the whole thing in suspension so nothing separates. Too much of it and a serum turns stringy, which is why it appears in fractions of a percent.
- Adenosine active
- Adenosine is a nucleoside that Korea's own cosmetic authority recognises as a wrinkle-care functional ingredient, which is why it appears on so many Korean lists at a low level. It is used for the look of fine lines and is stable and well tolerated.
- Disodium EDTA chelator
- EDTA is a chelator: it locks up trace metal ions from water and packaging that would otherwise turn a formula cloudy, off-colour or rancid. It does nothing to skin and appears at a fraction of a percent.
- Maltodextrin film former
- Maltodextrin is a starch-derived sugar chain used to carry powdered extracts and to form a light film. It also gives a soft, smoothing feel.
- Hydrolyzed Gardenia Florida Extract plant extract
- Hydrolyzed Gardenia Florida Extract is gardenia extract broken into smaller fragments so a water-based formula can carry it evenly.
- Spirulina Platensis Extract plant extract
- Spirulina is a blue-green microalga, unusually high in protein. Its extract carries amino acids and the blue pigment phycocyanin, which can tint a formula.
- Candida Bombicola/Glucose/Methyl Rapeseedate Ferment ferment
- This ferment produces sophorolipids, sugar-based molecules that behave as very mild surfactants and emulsifiers. It is used to keep a formula blended without a harsh cleanser.
- Simmondsia Chinensis (Jojoba) Seed Oil emollient
- Jojoba Oil is a liquid wax rather than a true oil, and its structure is close to human sebum, which is why it absorbs so readily. It is an emollient that leaves a soft, non-greasy finish.
- Agave Tequilana Leaf Extract plant extract
- Blue agave leaf extract. It carries fructans, sugars that hold water well, and is used as a hydrating extract.
- Caulerpa Lentillifera Extract plant extract
- Extract of sea grape, a green seaweed. It carries mineral-rich polysaccharides and is used as a hydrating marine extract.
- Tocopherol antioxidant
- Tocopherol is vitamin E. It is an oil-soluble antioxidant that protects the oils in a formula from going rancid and works on skin as an emollient, and it is regularly paired with vitamin C because each keeps the other going for longer.
- Market
- Korean market, the version sold in Korea
- EAN (barcode)
- 8809447255767
- Made in
- Republic of Korea
- Volume
- 28g
- Category
- Mask / Sheet mask, pack of 4
- Actives
- Adenosine, Allantoin, Jojoba Seed Oil, Niacinamide
- Ships from
- California or Korea
Orders ship from California or direct from Korea with tracked delivery to your door, and both routes carry the same Korean-market release. Shipping is free on orders of $100 or more. Returns are accepted for 30 days, by mail.
We split shipments free, so one out-of-stock item never holds up the rest of your order.
Where this unit came from
- 1Seoul
Bought as Korean-market stock - 2Barcode
Listed against the Korean barcode on its box - 3California or Korea
Ships to you from either, as the same Korean-market release
We stock the version of a formula that is sold in Korea, not the release a brand prepares for another market under the same name. The barcode in the specification above is the Korean-market one and it is printed on the box you receive.
Every unit keeps its original barcode and batch code intact, so the unit in your hands can be checked against the brand’s own records.
Every order ships from California or direct from Korea, and returns run for 30 days.
Every claim on this page traces to the unit in the box, the barcode, the batch code and the price you can read for yourself.
How to use
- Use the Aqua Blue Hydration Mask in the evening, after cleansing, in place of your toner and serum layers.
- Unfold the sheet, line it up at the eyes first, then smooth it outward so no air is trapped underneath.
- Take it off at the time printed on the pack, pat in the essence left behind rather than rinsing, then go to your moisturizer.
- Two or three evenings a week is a normal rhythm. Do not leave it on past its time; a sheet that has gone dry takes moisture back off the face.
Worth knowing
- Patch test this sheet mask on a small area and wait a day before using it more widely, especially with Niacinamide on the list.
- Introduce this sheet mask on its own for the first week, so anything your skin does is traceable to the Niacinamide rather than to three changes at once.
Reviews
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Dr. Althea Aqua Blue Hydration Mask
How it felt, how your skin took it, what you layer it with. Straight answers help the next person choose.
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A first try of the Dr. Althea serum on camera.
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Dr.Althea, Korean-market original
The Original Korean Formula sheet mask from Dr.Althea, 28g formulated with Niacinamide and Allantoin, shipped from California or direct from Korea.
Verify your unit when it arrives
Verify your unit when it arrives
Korean-market stock with the original barcode and batch code intact, exactly as it left Korea.
On the unit itself
- The Korean-market barcode, unaltered from the retail package.
- The manufacturer’s batch code, exactly as the maker printed it.
정품Genuine article, Korean-market stock
What professionals say
What professionals say
What skin-care professionals say about skin care, quoted from the medical sources linked beside each.
Your skin barrier is basically your outer layer of the skin.
Melissa Piliang, MDDermatologist, Cleveland Clinic Pretty much every step of a Korean skin care routine is going to have some component of hydration.
Alok Vij, MDDermatologist, Cleveland Clinic
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