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5 PDRN Hyaluronic Acid Vital Hydrating Hydrogel Mask$4.70Birch Juice Moisturizing Mask
Round Lab Birch Juice Moisturizing Mask (10 ea) is a wash-off mask for anyone who wants a once-weekly treatment step rather than a daily one, used once or twice a week.
No reviews yet$20.99
10ea
- Korean-market formula
- Ships from California or direct from Korea
- Korean barcode and batch code intact
- Suited to
- Normal skinCombination skinOily skinSkin that runs sensitive
- Helps with
- A weekly reset rather than a daily habitSkin that wants a heavier dose of a formula than a daily cream givesCongestion or a dull surface texture
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$4.70
- 30-day returns
- Free US shipping on orders of $100 or more
- Tracked delivery to your door
How it works
Round Lab Birch Juice Moisturizing Mask is built as a wash-off mask, so its texture and finish are designed around one specific place in a routine rather than several. Round Lab, TIRTIR and Torriden formulate this kind of wash-off mask to feel consistent with the rest of the brand's line, so the texture and absorption speed match what the format is meant to do. The texture is built for use once or twice a week, as a treatment step after cleansing and before your regular toner, which is why it behaves differently on skin than a product meant for a different point in a routine. This is the Korean-market formula of the birch juice moisturizing mask, the version sold on shelves in Korea rather than a formula reworked for a different market.
Key benefits
- Birch sap is declared at 9,900 ppm and sits fourth on the list, a stated concentration rather than a vague mention
- Sodium hyaluronate and allantoin carry the surface moisture and comfort side
- Dipotassium glycyrrhizate adds a licorice-derived calming note
- Fragrance-free and essential-oil-free
- 10 sheets per box, sized for a course of treatments rather than a single mask
Inside the formula
Inside the formula
22
Ingredients declared
No fragrance
on the list
Round Lab Birch Juice Moisturizing Mask
Is this the same formula sold in Korea, or a version made for the US market?
This is the Korean-market formula, the same one sold on shelves in Korea, not a separate version reformulated for US retail. The pack you open matches what a shopper in Seoul buys.
Where does this step go in a routine?
It belongs once or twice a week, as a treatment step after cleansing and before your regular toner. Placing it earlier or later than that changes how it feels going on and how well the steps after it absorb, so keeping it in that order is worth doing even on a simplified routine.
Can I use this if my skin runs sensitive?
This wash-off mask is formulated with skin types like normal skin, combination skin in mind, but any new product is worth a patch test first if your skin reacts easily. A short patch test on the inside of your arm or behind an ear is worth doing with any new product before it goes on your face, and that goes for sensitive skin most of all.
How long before I will know if this is right for my skin?
Give it a full week or two of consistent use before judging, since a single use rarely tells you much either way. Watch for how skin feels rather than for any specific number, and stop use if you notice ongoing irritation.
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 (22): Water, Glycerin, Methylpropanediol, Betula Platyphylla Japonica Juice (9900ppm), Althaea Rosea Flower Extract, Propanediol, Hydroxyacetophenone, Tromethamine, Sodium Hyaluronate, Allantoin, Polyglyceryl-10 Laurate, Polyglyceryl-10 Myristate, Butylene Glycol, Caprylyl Glycol, Ethylhexylglycerin, 1,2-Hexanediol, Dipotassium Glycyrrhizate, Glyceryl Caprylate, Carbomer, Caffeine, Xanthan Gum, Disodium EDTA
Ingredient list read from incidecoder.com on 30 August 2026.
22 of 22 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.
- Methylpropanediol humectant
- Methylpropanediol is a small glycol used to hydrate and to help water-soluble actives penetrate the outer layer of skin more evenly. It leaves almost no tack, which suits watery textures.
- Betula Platyphylla Japonica Juice (9900ppm) plant extract
- Betula Platyphylla Japonica Juice is Asian white birch sap, tapped in spring. It is over 98 percent water with trace minerals and sugars, and Korean formulas use it in place of plain water as a hydrating base.
- Althaea Rosea Flower Extract plant extract
- Althaea Rosea is hollyhock, a mallow relative rich in mucilage. Its flower extract hydrates and leaves a cushioned, slippery feel.
- Propanediol humectant
- Propanediol is a plant-derived glycol used in place of propylene glycol. It hydrates, carries actives into solution, and gives a lighter, less sticky slip than glycerin at the same strength.
- 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.
- Tromethamine pH adjuster
- Tromethamine neutralises acidic thickeners such as carbomer so they gel, and holds a formula near skin-friendly pH. It is used at a fraction of a percent.
- 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.
- 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.
- 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.
10 more explained
- 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.
- Caprylyl Glycol preservative booster
- Caprylyl Glycol is a glycol that conditions skin and, more importantly, strengthens a preservative system so less of the traditional preservative is needed. It appears in most modern formulas built without parabens.
- 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.
- 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.
- Dipotassium Glycyrrhizate active
- Dipotassium Glycyrrhizate is a water-soluble salt derived from licorice root. It is the licorice fraction Korean formulas use for the look of redness, and it is far more stable in water than the whole extract.
- Glyceryl Caprylate emulsifier
- Glyceryl Caprylate is a mild emulsifier that also makes a formula less hospitable to microbes, so it is often part of a preservative-free system.
- 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.
- Caffeine active
- Caffeine constricts small blood vessels near the surface, which is why eye products use it for the look of puffiness and shadow. It is water soluble and works only while it is on the 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.
- 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.
- Market
- Korean market, the version sold in Korea
- Made in
- Republic of Korea
- Volume
- 10ea
- Category
- Mask / Sheet Mask (10ea)
- Actives
- Allantoin, Birch Sap, Caffeine, Licorice Root, Sodium Hyaluronate
- 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.
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 it in the evening after cleansing and toner, on skin that is dry rather than damp with product.
- Unfold the sheet, line it up at the eyes first, then press it flat from the middle outwards.
- Leave it fifteen to twenty minutes and take it off while it is still damp rather than letting it dry on the face.
- Two or three times a week. Pat in what is left and put a moisturizer over it instead of rinsing.
Worth knowing
- Rinse fully with lukewarm water rather than leaving any residue behind, since a wash-off mask is not meant to sit on skin overnight.
- Keep this to once or twice a week; using a treatment mask daily works against a normal routine rather than for it.
Reviews
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Round Lab Birch Juice Moisturizing Mask
How it felt, how your skin took it, what you layer it with. Straight answers help the next person choose.
Round Lab, Korean-market original
Moisturizing facial pads, 10 ea, with Birch Sap, Sodium Hyaluronate and Allantoin.
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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