Sungboon Editor
Deep Collagen CICA Teatree Soothing Mask$11.76Acni Dr. 1st Speedy Mask 20ml x 10ea
isoi Acni Dr. 1st Speedy Mask is a sheet mask whose ingredient list carries Houttuynia Cordata Extract alongside Centella Asiatica Extract and Sophora Flavescens Root Extract.
No reviews yet- Korean-market formula
- Ships from California or direct from Korea
- Korean barcode and batch code intact
- Suited to
- Oily skinCombination skinBlemish-prone skin
- Helps with
- Skin that looks congested or blemish-proneFitting a Korean-market step into an existing routineShoppers who want the same formula sold on shelves in Korea
In stock. Arrives in 3 to 7 business days
We accept
You’re $100.00 away from free US shipping.
- 30-day returns
- Free US shipping on orders of $100 or more
- Tracked delivery to your door
How it works
The Acni Dr. 1st Speedy Mask is a sheet mask, used after toner, in place of your serum step, in the evening. The plant extract it is built around is Houttuynia Cordata Extract, named sixth on its own ingredient list. The same list carries Centella Asiatica Extract, Sophora Flavescens Root Extract and Hippophae Rhamnoides Fruit Extract, so the plant extract is not the only thing on it worth naming. How much of the Houttuynia Cordata Extract 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 isoi sells in Korea, Houttuynia Cordata Extract and all.
Key benefits
- Houttuynia Cordata Extract, the plant extract this sheet mask is built around
- Centella Asiatica Extract, Sophora Flavescens Root Extract, Hippophae Rhamnoides Fruit Extract and Castanea Crenata (Chestnut) Shell Extract on the same list, plant extracts
- Salix Alba (Willow) Bark Extract and Cinnamomum Cassia Bark Extract further down the same list
- Origanum Vulgare Leaf Extract and Chamaecyparis Obtusa Leaf Extract further down the same list
- Houttuynia Cordata Extract named sixth on the manufacturer list printed on this page
- Sourced for the Korean market, not a US-shelf reformulation of this sheet mask
How to use
- After cleansing and toning, unfold the sheet over dry skin, leave on for 15 to 20 minutes, then remove and pat in any remaining essence rather than rinsing.
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 Houttuynia Cordata Extract and not three changes at once.
Is this the Korean-market sheet mask or a US version?
The Korean-market one, Houttuynia Cordata Extract 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.
Does this sheet mask contain fragrance?
Yes. The ingredient list names Citral and Citronellol. They sit on the panel printed on this page, so you can read the position for yourself before you buy. If fragrance components are something you avoid, this sheet mask is not the one.
What else is on the list besides Houttuynia Cordata Extract?
Centella Asiatica Extract, Sophora Flavescens Root Extract and Hippophae Rhamnoides Fruit Extract. The order they are printed in on this sheet mask's panel is the order on the box, so you can see where Houttuynia Cordata Extract sits relative to them. Further down the same panel: Castanea Crenata (Chestnut) Shell Extract, Salix Alba (Willow) Bark Extract and Cinnamomum Cassia Bark Extract.
Not on the ingredient list below: fragrance or parfum, silicones, parabens, sulfate surfactants, mineral oil or petrolatum and added color.
Full INCI (28): Water, Glycerin, Betaine, Ethanol, Panthenol, Houttuynia Cordata Extract, Leptospermum Petersonii Oil, Centella Asiatica Extract, Rosa Damascena Flower Oil, Sophora Flavescens Root Extract, Hippophae Rhamnoides (Sea Buckthorn) Fruit Extract, Castanea Crenata Shell Extract, Salix Alba (Willow) Bark Extract, Rosa Damascena Flower Water, Lactobacillus/Soybean Ferment Extract, Cinnamomum Cassia Bark Extract, Origanum Vulgare Leaf Extract, Chamaecyparis Obtusa Leaf Extract, Portulaca Oleracea Extract, Xanthan Gum, Butylene Glycol, 1,2-Hexanediol, Calendula Officinalis (Pot Marigold) Flower Extract, Scutellaria Baicalensis Root Extract, Paeonia Suffruticosa Root Extract, Glycyrrhiza Glabra (Licorice) Root Extract, Citral, Citronellol
Ingredient list read from isoi.co.kr on 30 August 2026.
27 of 28 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.
- 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.
- 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.
- Ethanol solvent
- Alcohol here means ethanol. It dissolves ingredients water cannot, evaporates fast so a formula sets quickly and does not feel heavy, and thins texture. In quantity it can leave dry or reactive skin feeling tight, which is why many Korean formulas avoid it and some deliberately use it for a fast, weightless finish.
- Panthenol humectant
- Panthenol is pro-vitamin B5: skin converts it to pantothenic acid. It is a humectant that holds water and leaves skin feeling soft and less tight, and it is one of the ingredients formulators reach for when a formula also contains something harsh.
- Houttuynia Cordata Extract plant extract
- Houttuynia Cordata is heartleaf, and it is one of the two or three anchor plants of Korean calming skincare. Its extract carries quercitrin and other flavonoids and is used for the look of redness and blemish-prone skin.
- Centella Asiatica Extract plant extract
- Centella Asiatica is the plant behind the whole cica category, sold as gotu kola or Madagascar centella. Its extract is the anchor of Korean formulas built for easily reddened skin, and its work is done by four triterpenes: asiaticoside, madecassoside, asiatic acid and madecassic acid.
- Rosa Damascena Flower Oil fragrance component
- Rosa Damascena Flower Oil is rose essential oil, one of the most expensive materials in perfumery. It scents a formula, and like every essential oil it is a class reactive skin often does not tolerate.
- Sophora Flavescens Root Extract plant extract
- Kushen root extract, a bitter traditional herbal ingredient carrying alkaloids and flavonoids. Korean formulas use it in scalp and blemish-focused products.
- Hippophae Rhamnoides (Sea Buckthorn) Fruit Extract plant extract
- Sea Buckthorn Fruit Extract is high in vitamin C and carotenoids, which give it a strong orange colour. It is used as an antioxidant extract.
- Castanea Crenata Shell Extract plant extract
- Chestnut Shell Extract carries tannins and is used as an antioxidant plant extract, most often in formulas aimed at visible pores.
- Salix Alba (Willow) Bark Extract plant extract
- Willow Bark Extract carries salicin, the plant compound salicylic acid is related to. The two are not interchangeable: willow bark is a mild clarifying extract, not a BHA exfoliant at the levels used in cosmetics.
15 more explained
- Rosa Damascena Flower Water plant extract
- Rosa Damascena Flower Water is the water left from distilling rose petals. It is used in place of plain water as a base and carries the scent and trace compounds of the distillation.
- Lactobacillus/Soybean Ferment Extract ferment
- This is soybean fermented by lactobacillus. The fermentation breaks soy proteins into smaller pieces, which is what makes the extract easier for a formula to carry.
- Cinnamomum Cassia Bark Extract plant extract
- Cassia cinnamon bark extract, a traditional herbal ingredient carrying cinnamaldehyde and tannins. It is used in warming, antioxidant-rich blends.
- Origanum Vulgare Leaf Extract plant extract
- Oregano leaf extract, rich in the phenols carvacrol and thymol. It is used as an antioxidant plant extract and brings its own herbal scent with it.
- Chamaecyparis Obtusa Leaf Extract plant extract
- Chamaecyparis Obtusa is hinoki cypress. Its leaf extract carries aromatic plant compounds and is used in Korean formulas aimed at oily, congested skin.
- Portulaca Oleracea Extract plant extract
- Portulaca Oleracea is purslane. Its extract is unusually high in omega-3 fatty acids and antioxidants for a plant, and Korean formulas use it for the look of reddened, reactive skin.
- 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.
- 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.
- 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.
- Calendula Officinalis (Pot Marigold) Flower Extract plant extract
- Marigold flower extract, one of the oldest plant ingredients used for the look of reddened, easily bothered skin. It carries carotenoids and flavonoids.
- Scutellaria Baicalensis Root Extract plant extract
- Scutellaria Baicalensis is Chinese skullcap. Its root extract carries baicalin, a well studied plant antioxidant, and it is used for the look of redness.
- Paeonia Suffruticosa Root Extract plant extract
- Paeonia Suffruticosa is tree peony, a long-standing East Asian medicinal plant. Its root extract carries paeoniflorin and is used for the look of reddened skin.
- Glycyrrhiza Glabra (Licorice) Root Extract plant extract
- Licorice Root Extract carries glabridin and liquiritin. It is one of the classic plant ingredients used for the look of uneven tone and redness, and it appears in almost every brightening formula that avoids synthetic actives.
- Citral fragrance component
- Citral is a sharp lemon aromatic found in lemongrass and citrus oils. It is one of the 26 fragrance components EU labelling requires to be named.
- Citronellol fragrance component
- Citronellol is a rose-geranium aromatic and one of the 26 fragrance components EU labelling names individually.
- Market
- Korean market, the version sold in Korea
- EAN (barcode)
- 8809264725528
- Made in
- Republic of Korea
- Category
- Mask
- Actives
- Centella Asiatica, Heartleaf (Houttuynia Cordata), Licorice Root, Panthenol, Sea Buckthorn
- 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.
Inside the formula
Inside the formula
Worth knowing
- Introduce any new product gradually rather than adding several new steps to a routine at once, so a reaction is easy to trace back to the right cause.
- Patch test on a small area first and wait a day before applying it to the full face, especially the first time you use it.
Complete the routine
- This itemisoi Acni Dr. 1st Speedy Mask 20ml x 10ea$77.50

- The treatment step of this routineisoi Bulgarian Rose Blemish Care Spot 25ml$45.00

- Seal the routine in as the last stepisoi Bulgarian Rose Intensive Treatment Lotion 90ml$95.00

Total for 3 items$217.50
Reviews
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isoi Acni Dr. 1st Speedy Mask 20ml x 10ea
How it felt, how your skin took it, what you layer it with. Straight answers help the next person choose.
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isoi, Korean-market original
The Original Korean Formula sheet mask from isoi, formulated with Houttuynia Cordata Extract and Centella Asiatica Extract, 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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