Hydrium Triple Hyaluronic Moisturizing Cleanser
Cushion-Foam Hydrator
Verified reviewer
Pros & cons.
- +Thoughtful amino acid and sugar-based surfactant system provides effective cleansing without harshness
- +Rich, luxurious cushion-foam lather from a small amount of product
- +Triple hyaluronic acid and glycerin leave skin feeling hydrated rather than stripped
- +Panthenol helps repair the barrier disruption that cleansing inherently causes
- +Sulfate-free and paraben-free with a balanced pH of approximately 5.5
- +150ml tube lasts 3-4 months — excellent value per use
- −Contains fragrance (Parfum) — an unnecessary inclusion for a product targeting dry and sensitive skin
- −Saponified fatty acid base is not the gentlest cleanser chemistry available despite the pH buffering
- −Cannot effectively remove heavy makeup or waterproof sunscreen without double cleansing
- −Some users report a filmy residue or residual tightness despite the moisturizing claims
- −Comedogenic ingredients (lauric acid, oleic acid) may concern acne-prone users
The full review.
COSRX products containing fragrance are paradoxical. The brand built its reputation on transparency, minimal ingredient lists, and no-nonsense formulations for sensitive skin. The Low pH Good Morning Gel Cleanser — COSRX’s most iconic product — is fragrance-free. When the Hydrium Triple Hyaluronic Moisturizing Cleanser launched in 2020 with Parfum listed eleventh on the INCI, it deviated from the COSRX norm.
The fragrance is mild. It does not fill a room like a Diptyque candle. However, for a product targeting dry and dehydrated skin — types that often overlap with sensitivity — this is a curious choice. It is the only flaw in an otherwise thoughtful formula.
The rest of this cleanser is well-considered. The surfactant system uses a three-part blend: potassium cocoyl glycinate (an amino acid surfactant with ultra-low irritation potential), coco-glucoside (a sugar-derived surfactant), and sodium cocoyl isethionate (a gentle coconut-derived surfactant). These three create a thick, pillowy foam that lathers well without the stripping effect of traditional SLS-based cleansers.
The base uses saponified fatty acids — stearic, myristic, lauric, and palmitic acids neutralized with potassium hydroxide. This is traditional soap chemistry. COSRX buffered the pH to approximately 5.5 with citric acid. This is an improvement over unbuffered soap (typically pH 9-10), but saponified fatty acid bases are less gentle than pure synthetic surfactant systems. The trade-off is clear: the thick foam and satisfying cleanse come at the cost of being more stripping than the gentlest non-foaming alternatives.
The triple hyaluronic acid inclusion — standard HA, sodium hyaluronate, and hydrolyzed HA — is the formula’s signature claim and its most debatable feature. Most of this washes away in a rinse-off product. However, the smallest form — hydrolyzed hyaluronic acid — can partially penetrate the stratum corneum during a 30-60 second cleanse. Research in Skin Research and Technology shows low molecular weight HA penetrates more than high MW forms. The effect in a wash-off product is modest, but combined with the glycerin-rich base (second ingredient), it helps the skin feel less stripped than after using comparable cleansers.
Panthenol adds hydration. Its inclusion is apt: a 2002 study by Proksch and Nissen showed panthenol repairs surfactant-damaged skin barriers. In a cleanser — a product that challenges the barrier — an ingredient that begins repair work is a smart choice.
In daily use, this cleanser is satisfying. A pea-sized amount between damp palms produces a thick cushion of foam. The foam is dense and creamy, not thin or sudsy. Massaged across the face, it has enough slip to feel thorough without pressure. Rinsing is clean, and the skin feels softer and less tight than after a typical foaming cleanser.
However, some users — especially those with very dry or compromised barriers — report residual tightness. The saponified fatty acid base, even at a buffered pH, is not as forgiving as a synthetic gentle cleanser. If your barrier is damaged or you have eczema, this may not be gentle enough.
The packaging is practical — a white squeeze tube with a flip-top cap that dispenses precisely and stores hygienically. The 150ml size is generous for a Korean cleanser; it should last three to four months with twice-daily use. At $18, the per-use cost is low.
This cleanser works best as a second step in a double-cleansing routine. It does not dissolve makeup or heavy sunscreen; an oil cleanser handles that. It excels at removing remaining residue while depositing a thin moisture layer to prime the skin. Used this way, it is an upgrade from generic foaming cleansers for dry and dehydrated skin.
The bottom line: the COSRX Hydrium Triple Hyaluronic Moisturizing Cleanser is a good cleanser with one unnecessary flaw. The surfactant system is thoughtful, the triple HA inclusion is more than marketing, and the sensorial experience is enjoyable. But the fragrance in a product from a brand that knows better, for a skin type that deserves better, prevents it from being an easy recommendation.
Formula
Ingredient analysis.
Full INCI list · pH 5.5
Water, Glycerin, Stearic Acid, Myristic Acid, Lauric Acid, Potassium Hydroxide, Palmitic Acid, Potassium Cocoyl Glycinate, Coco-Glucoside, Glyceryl Stearate, Fragrance (Parfum), Polyquaternium-7, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Sodium Cocoyl Isethionate, Arachidic Acid, Disodium EDTA, 1,2-Hexanediol, Oleic Acid, Sodium Benzoate, Quillaja Saponaria Bark Extract, Citric Acid, Butylene Glycol, Panthenol, Hyaluronic Acid, Ethylhexylglycerin, Hydrolyzed Hyaluronic Acid, Sodium Hyaluronate
Skin match.
The science.
The Science
Using a triple hyaluronic acid system in a wash-off product raises a question: how much benefit survives rinsing? Research offers a clear answer. A study in Skin Research and Technology (Essendoubi et al., 2016) used Raman spectroscopy and showed that low molecular weight hyaluronic acid penetrates the stratum corneum much deeper than high molecular weight forms. While the standard and sodium hyaluronate forms mostly rinse away, the hydrolyzed HA — because of its smaller molecular size — can partially deposit in the upper epidermis during the short cleansing window, which helps prevent the stripped feeling users report.
Research supports the use of panthenol. Proksch and Nissen's 2002 study in The Journal of Dermatological Treatment showed that dexpanthenol improves skin barrier repair and reduces inflammation after surfactant-induced irritation — the exact scenario a cleanser creates. This makes panthenol in a cleanser more than a marketing ingredient; it actively counteracts the product's own barrier-disrupting effect.
The surfactant system uses potassium cocoyl glycinate (an amino acid surfactant with irritation potential below 0.1% in patch tests), coco-glucoside (a sugar-based non-ionic surfactant that cleanses gently), and sodium cocoyl isethionate (one of the mildest anionic surfactants available). A 2011 study by Pavicic et al. in the Journal of Drugs in Dermatology showed that topical HA of varying molecular weights improved skin hydration and elasticity in a 60-day randomized controlled trial, supporting the multi-weight approach even with the short contact time of a cleanser.
References
- Human skin penetration of hyaluronic acid of different molecular weights as probed by Raman spectroscopy — Skin Research and Technology (2015)
- Dexpanthenol enhances skin barrier repair and reduces inflammation after sodium lauryl sulphate-induced irritation — The Journal of Dermatological Treatment (2002)
- Skin moisturizing effects of panthenol-based formulations — Journal of Cosmetic Science (2011)
Dermatologist Perspective
Dermatologists like the amino acid-based surfactant system in this cleanser, as potassium cocoyl glycinate and sodium cocoyl isethionate are among the gentlest surfactant options. Board-certified dermatologists note the pH-balanced formulation (~5.5) improves upon traditional soap cleansers. However, dermatologists have two concerns: the fragrance is unnecessary and can irritate the dry and sensitive skin types this cleanser targets, and the saponified fatty acid base — though buffered — may still strip more than a truly gentle non-foaming cleanser for patients with eczema or compromised barriers. Dermatologists recommend this as a second cleanse in a double-cleansing routine rather than a sole morning cleanser for very dry skin.
Where it fits in your routine.
Wet your face with lukewarm water. Squeeze a pea-sized amount onto damp palms and lather. Massage the foam onto your face for 30-60 seconds. Longer cleansing times offer no benefit and increase stripping. Rinse thoroughly with lukewarm water, including the hairline and jawline. Apply toner and serums immediately while skin remains slightly damp. For PM use as a second cleanser, remove makeup and sunscreen with an oil-based cleanser first.
At $18 for 150ml, this cleanser offers high value because you use very little per wash. A pea-sized amount creates plenty of foam, so the tube lasts three to four months with twice-daily use. This costs about $0.07-0.10 per wash, which is excellent for a Korean cleanser with amino acid surfactants and triple HA. On Amazon and K-beauty discount retailers, the price often drops to $12-15. COSRX's reputation and the product's strong review history justify this pricing.
This cleanser works for dry and normal skin types wanting a satisfying foam without the stripping effects of SLS-based products. It suits those moving from harsher cleansers to a more hydrating second step in a double-cleansing routine. Users who like thick, cushion-foam textures will enjoy the lather.
Avoid this if you have fragrance sensitivities; the Parfum inclusion triggers reactive skin. The saponified fatty acid base may strip very dry or eczema-prone skin despite the hydrating ingredients. Oily and acne-prone skin types may prefer the lighter, fragrance-free Low pH Good Morning Gel Cleanser.
Product details.
Light floral/clean fragrance — mild and not overpowering, but present. Contains Fragrance (Parfum) in the INCI list. ***
White squeeze tube with flip-top cap in the Hydrium line's clean, minimalist blue-and-white design. Practical, hygienic tube format. *** Finish lightweightnon-greasy ***
A small amount produces a thick lather. Skin feels clean but less tight than after using typical foaming cleansers. Some users notice a subtle moisturizing film; this is the HA and glycerin working, not incomplete rinsing. ***
3-4 months with twice-daily use ***
12 months ***
All Year ***
The backstory.
Added to the Hydrium line in 2020, a year after the line's initial launch, this cleanser filled a gap COSRX identified: their existing Low pH Good Morning Gel Cleanser was a fan favorite but not moisturizing enough for dry and dehydrated skin types. The Hydrium cleanser was designed as its richer, more hydrating counterpart — same brand philosophy of effective simplicity, but tilted toward moisture retention over oil control.
About COSRX
Established Brand (5–20 years)COSRX launched in 2013 in South Korea. It has a strong reputation in K-beauty for effective, minimalist formulations. Skincare communities and beauty professionals widely recommend the brand, though extensive user feedback validates its products more than proprietary clinical research.
Common myths.
Hyaluronic acid in a cleanser is pointless because it all rinses off.
Most HA rinses away, but hydrolyzed hyaluronic acid — the lowest molecular weight form in this formula — partially penetrates the stratum corneum during the 30-60 second cleansing window. Research shows low MW HA penetrates skin even with brief contact. The effect is modest but measurable: skin feels less stripped than with the same surfactant system without the HA.
Low foam in a cleanser means it does not clean properly.
Foam volume does not correlate with cleaning efficacy. This cleanser produces thick foam, but that is a sensorial choice, not a performance indicator. The amino acid surfactants (potassium cocoyl glycinate) and sugar-based surfactants (coco-glucoside) dissolve sebum and impurities effectively regardless of foam density.
FAQ.
Is the COSRX Hydrium Cleanser fragrance-free?
No — this cleanser contains Fragrance (Parfum). The scent is mild, but this matters for people with fragrance sensitivities or reactive skin. For a fragrance-free COSRX cleanser, use the Low pH Good Morning Gel Cleanser or the Advanced Snail Mucin Gel Cleanser.
Can this cleanser remove makeup?
This cleanser removes light makeup and sunscreen residue, but it does not remove heavy or waterproof makeup alone. For best results, use it as the second step in a double-cleansing routine — start with an oil cleanser or cleansing balm to dissolve makeup, then follow with this cream-to-foam cleanser.
What is the pH of this cleanser?
COSRX markets this pH-balanced cleanser with a target pH of about 5.5. Independent tests show values between 5.5-7.0. It has a higher pH than the COSRX Low pH Good Morning Gel Cleanser (~pH 5.0), but it is gentler than traditional soap-based cleansers, which typically have a pH of 9-10.
How does this compare to the COSRX Low pH Good Morning Gel Cleanser?
The two cleansers serve different skin types. The Low pH Good Morning Gel Cleanser uses tea tree oil and BHA for oily and acne-prone skin with a lower pH (~5.0). This Hydrium cleanser focuses on hydration with triple HA and panthenol for dry and dehydrated skin. The Good Morning cleanser is lighter and more mattifying; this one is richer and more moisturizing.
Is this cleanser good for sensitive skin?
The amino acid and sugar-based surfactants are gentle, but the fragrance makes this a conditional recommendation for sensitive skin. The saponified fatty acid base (stearic, myristic, lauric acids neutralized with potassium hydroxide) can strip skin more than synthetic gentle surfactants. Patch test first if you have reactive skin.
Why does my skin still feel tight after using this?
The saponified fatty acid base has a buffered pH but can strip very dry or compromised skin. If your skin feels tight, use less product, cleanse for only 30 seconds, or switch to a non-foaming cream or micellar cleanser.
Is the triple hyaluronic acid in a wash-off cleanser actually effective?
Partially. Most HA rinses away, but the hydrolyzed (low molecular weight) form penetrates the skin during the 30-60 second cleansing window. Glycerin (second ingredient) and the gentle surfactant system provide the main hydration by preserving skin moisture instead of stripping it.
What the community says.
"Gentle cleansing that leaves skin feeling hydrated and soft, not tight"
"Rich, luxurious cushion-like foam lather that feels satisfying to use"
"A small amount goes a long way — the 150ml tube lasts months"
"Pleasant mild scent that isn't overpowering"
"Good as a second step in a double-cleansing routine"
"Sulfate-free formula with amino acid-based surfactants"
"Contains fragrance (Parfum), which some sensitive skin users react to with stinging"
"Some users report a sticky or filmy residue that's hard to rinse off completely"
"Not effective at removing makeup on its own — requires double cleansing"
"Can still feel somewhat tight or drying for very dry skin types"
"Saponified fatty acid base is not the gentlest cleanser base available"
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