COSRX
5 PDRN Hyaluronic Acid Vital Hydrating Hydrogel Mask$4.70Isntree
Ultra-Low Molecular Hyaluronic Acid Mask
Isntree Ultra-Low Molecular Hyaluronic Acid Mask is a sheet mask with Hydrolyzed Hyaluronic Acid, used after toner, in place of your serum step, in the evening.
No reviews yet$33.99
- Korean-market formula
- Ships from California or direct from Korea
- Korean barcode and batch code intact
- Suited to
- SensitiveDryNormalCombination
- Helps with
- Dehydration and tight-feeling skinMoisture loss through the dayPost-exfoliation sensitivityA weekly boost between regular routine steps
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VT Reedle Shot 700 2-Step MaskVT Cosmetics
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How it works
The Ultra-Low Molecular Hyaluronic Acid Mask is a sheet mask, used after toner, in place of your serum step, in the evening. The humectant it is built around is Hydrolyzed Hyaluronic Acid, named sixth on its own ingredient list. The same list carries Acetyl Glucosamine, Allantoin and Borago Officinalis Extract, so the humectant is not the only thing on it worth naming. How much of the Hydrolyzed Hyaluronic Acid 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 Isntree sells in Korea, Hydrolyzed Hyaluronic Acid and all.
Key benefits
- Hydrolyzed Hyaluronic Acid, the humectant this sheet mask is built around
- Acetyl Glucosamine and Allantoin on the same list, actives
- Borago Officinalis Extract and Chamomilla Recutita (Matricaria) Flower Extract on the same list, plant extracts
- Centaurea Cyanus Flower Extract and Hyacinthus Orientalis Extract further down the same list
- Lavandula Angustifolia (Lavender) Flower Extract and Salvia Sclarea (Clary) Extract further down the same list
- Hydrolyzed Hyaluronic Acid named sixth on the manufacturer list printed on this page
Inside the formula
Inside the formula
35
Ingredients declared
No fragrance
on the list
Isntree Ultra-Low Molecular Hyaluronic Acid 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 Hydrolyzed Hyaluronic Acid and not three changes at once.
Is this the Korean-market sheet mask or a US version?
The Korean-market one, Hydrolyzed Hyaluronic Acid 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 Hydrolyzed Hyaluronic Acid?
Acetyl Glucosamine, Allantoin and Borago Officinalis Extract. The order they are printed in on this sheet mask's panel is the order on the box, so you can see where Hydrolyzed Hyaluronic Acid sits relative to them. Further down the same panel: Chamomilla Recutita (Matricaria) Flower Extract, Centaurea Cyanus Flower Extract and Hyacinthus Orientalis 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 (35): Water, Sea Water, Glycerin, Butylene Glycol, Dipropylene Glycol, Hydrolyzed Sodium Hyaluronate, Sodium Hyaluronate, Hyaluronic Acid, Hydroxypropyltrimonium Hyaluronate, Hydrolyzed Hyaluronic Acid, Sodium Acetylated Hyaluronate, Sodium Hyaluronate Crosspolymer, Potassium Hyaluronate, Borago Officinalis Extract, Chamomilla Recutita (Matricaria) Flower Extract, Centaurea Cyanus Flower Extract, Hyacinthus Orientalis (Hyacinth) Extract, Lavandula Angustifolia (Lavender) Flower Extract, Salvia Sclarea (Clary) Extract, Acetyl Glucosamine, Polyglutamic Acid, Squalane, Trehalose, 1,2-Hexanediol, Hydroxyacetophenone, Carbomer, Allantoin, Betaine, Arginine, Ethylhexylglycerin, Xanthan Gum, Hydroxyethylcellulose, Disodium EDTA, Polyglyceryl-10 Laurate, Polyglyceryl-10 Myristate
Ingredient list read from inkeedecoder.com on 10 September 2026.
34 of 35 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.
- Sea Water mineral
- Sea Water is filtered and desalinated seawater used in place of plain water. It carries magnesium, calcium and potassium, so it brings the mineral balance of the base closer to skin's own.
- 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.
- 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.
- Dipropylene Glycol humectant
- Dipropylene Glycol is a glycol used as a solvent and a light humectant. Its main job is keeping the rest of the formula dissolved and the texture fluid rather than adding hydration of its own.
- Hydrolyzed Sodium Hyaluronate humectant
- Hydrolyzed Hyaluronic Acid is hyaluronic acid cut into much shorter fragments. The smaller the fragment, the further into the outer layer it can settle, which is why serums stack several sizes together instead of using one.
- Sodium Hyaluronate humectant
- Sodium Hyaluronate is the salt of hyaluronic acid, and it is what most products labelled hyaluronic actually contain. The salt dissolves more readily and the molecule is smaller, so it sits in the outer layer of skin rather than only on top of it.
- Hyaluronic Acid humectant
- Hyaluronic Acid is a sugar chain the body already makes, and one gram of it can hold several litres of water. In a formula it is a humectant that pulls water to the surface of skin and holds it in a film, which is what makes skin look plumper while it is there.
- Hydroxypropyltrimonium Hyaluronate humectant
- Hydroxypropyltrimonium Hyaluronate carries a positive charge, and skin carries a slight negative one, so it is attracted to the surface and stays through rinsing. It is the hyaluronic used where a formula gets washed off.
- Sodium Acetylated Hyaluronate humectant
- Sodium Acetylated Hyaluronate is hyaluronic acid modified to be part oil-loving, so it clings to skin instead of rinsing away. Formulators call it the one that stays put.
- Sodium Hyaluronate Crosspolymer humectant
- Sodium Hyaluronate Crosspolymer is hyaluronic acid linked into a mesh. It holds water in a soft gel on the surface rather than sinking in, and it releases that water slowly through the day.
- Potassium Hyaluronate humectant
- Potassium Hyaluronate is another salt of hyaluronic acid, used for the same reason as the sodium form: it dissolves easily and holds a large amount of water in the outer layer of skin.
22 more explained
- Borago Officinalis Extract plant extract
- Borage extract. The plant is best known for the gamma-linolenic acid in its seed oil, while the water extract carries mucilage that holds water at the surface.
- Chamomilla Recutita (Matricaria) Flower Extract plant extract
- Chamomile Flower Extract is one of the oldest ingredients in skincare, carrying bisabolol and chamazulene. It is used for the look of redness in formulas for reactive skin.
- Centaurea Cyanus Flower Extract plant extract
- Cornflower extract, a traditional eye-area ingredient in European pharmacy. It carries flavonoids and anthocyanins and is used in gentle formulas.
- Hyacinthus Orientalis (Hyacinth) Extract plant extract
- Hyacinth extract, used as a floral herbal extract. It is one of the less common botanicals to meet on a Korean label.
- Lavandula Angustifolia (Lavender) Flower Extract plant extract
- Lavender Flower Extract is the water-based extract rather than the essential oil, so it is much milder and less aromatic.
- Salvia Sclarea (Clary) Extract plant extract
- Clary sage extract, carrying flavonoids and tannins. It is the water-based extract and a different ingredient from clary sage essential oil.
- Acetyl Glucosamine active
- Acetyl Glucosamine is the sugar unit hyaluronic acid is built from. It is used as a humectant and, at higher levels, for the look of uneven tone, often paired with niacinamide.
- Polyglutamic Acid humectant
- Polyglutamic Acid comes from fermented soy and holds several times more water than hyaluronic acid for its weight. It forms a light film on the surface, so it is often layered with hyaluronic rather than replacing it.
- Squalane emollient
- Squalane is the stable, saturated version of squalene, a lipid human skin already makes. It is a light emollient that absorbs quickly, does not oxidise, and is one of the few oils widely considered safe for blemish-prone skin. Most cosmetic squalane is now from sugarcane or olive rather than shark.
- Trehalose humectant
- Trehalose is a sugar that some desert plants use to survive drying out. In skincare it is a humectant that holds water in the outer layer and helps a formula feel comfortable rather than tight.
- 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.
- Hydroxyacetophenone preservative booster
- Hydroxyacetophenone is an antioxidant that also strengthens a preservative system, so a formula needs less traditional preservative. Korean formulas pair it with 1,2-hexanediol constantly.
- 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.
- Betaine humectant
- Betaine is a sugar-beet-derived humectant that cells use to hold water. In a formula it hydrates and takes the edge off cleansers and acids, which is why it often appears alongside them.
- 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.
- 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.
- 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.
- Hydroxyethylcellulose thickener
- Hydroxyethylcellulose is a cellulose thickener that builds a clear, smooth gel and holds the rest of the formula in suspension.
- 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.
- 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.
- Polyglyceryl-10 Myristate emulsifier
- Polyglyceryl-10 Myristate is a mild sugar-derived emulsifier used to keep oil dispersed in a watery formula.
- Market
- Korean market, the version sold in Korea
- EAN (barcode)
- 8809800940675
- Made in
- Republic of Korea
- Category
- Mask / Sheet mask
- Actives
- Allantoin, Hyaluronic Acid, Sodium Hyaluronate, Squalane, Trehalose
- 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 Ultra-Low Molecular Hyaluronic Acid Mask after toner, in place of your serum step, in the evening.
- 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 straight 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 as it goes.
Worth knowing
- Patch test on the inner arm before a first full-face application if skin tends to react easily.
- Store away from direct sunlight and high heat to keep the texture and scent stable over time.
- Introduce one new active at a time when adding this into an existing routine.
Reviews
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Isntree Ultra-Low Molecular Hyaluronic Acid Mask
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Isntree, Korean-market original
The Original Korean Formula sheet mask from Isntree, formulated with Hydrolyzed Hyaluronic Acid and Acetyl Glucosamine, 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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