Most sleeping masks use water as their primary base, but this formula leads with 68% rice extract — making rice the functional foundation of the entire product rather than a supplementary active. Combined with 2% niacinamide, it creates a dual-pathway brightening system (rice antioxidants + niacinamide melanin inhibition) in a fragrance-free, 19-ingredient formula that draws on centuries of Asian rice-washing skincare tradition.
A sleeping mask that turns centuries of rice-washing tradition into an effective overnight brightening treatment — 68% rice extract with niacinamide delivers genuinely luminous mornings, and the fragrance-free formula at $18 makes it one of the most accessible entry points into K-beauty sleeping masks.
The case for it
Same rule for everyone. “Good choice” is the verdict on 9,564 of 45,024 concern verdicts across the catalog; rule R5 decided 9,072 of them. Unchanged since September 5, 2026, engine 5.1.1.
Brand or formulator? Disclose a concentration or correct a fact →
The studies behind the evidence row
The case for it
Same rule for everyone. “Good choice” is the verdict on 9,564 of 45,024 concern verdicts across the catalog; rule R5 decided 9,072 of them. Unchanged since September 5, 2026, engine 5.1.1.
Brand or formulator? Disclose a concentration or correct a fact →
The studies behind the evidence row
The case for it
What would change this: Guideline or regulatory standing for the active on this concern would move this from a promising bet to a recommendation.
Same rule for everyone. “Promising” is the verdict on 7,858 of 45,024 concern verdicts across the catalog; rule R9p decided 7,858 of them. Unchanged since September 5, 2026, engine 5.1.1.
Brand or formulator? Disclose a concentration or correct a fact →
The studies behind the evidence row
The case for it
Same rule for everyone. “Good choice” is the verdict on 9,564 of 45,024 concern verdicts across the catalog; rule R5 decided 9,072 of them. Unchanged since September 5, 2026, engine 5.1.1.
Brand or formulator? Disclose a concentration or correct a fact →
The studies behind the evidence row
The case for it
What would change this: A researched evidence row for the lead active would replace this with a verdict.
Same rule for everyone. “Good choice” is the verdict on 1,938 of 45,024 concern verdicts across the catalog; rule F2 decided 1,938 of them. Unchanged since September 5, 2026, engine 5.1.1.
Brand or formulator? Disclose a concentration or correct a fact →
Also listed for Winter Skin — the actives here (Rice, Glycerin, Niacinamide, Allantoin) are in our research queue for that concern; there is no verdict until their evidence rows are written. That is a gap in our table, not a mark against the product.
As a maskNot judged: what a mask is for — works within its wear time, benefit outlasts the mask, comes off cleanly — cannot yet be measured from the ingredient list (only intensity without injury can).
Where our review and the verdict differ. The review below was written on the formulation and the published trials; the verdicts above apply the stricter standing test in our methodology — an active earns a recommendation only with guideline or regulatory standing for the concern. Where the two disagree, the verdict is DermApproved’s position.
A verdict is DermApproved’s assessment of how well a product’s ingredients fit a concern — never a claim about what the product treats. Evidence dots and collected reviews sit beside it and are never blended in. Rules 0.5.1 · evidence table ev-2026.09-r228 · how we decide
Long before the K-beauty industry codified the ten-step routine, women across East Asia were saving the water from rinsing rice and using it to wash their faces. The practice dates back centuries — Japanese geishas in Kyoto's entertainment district were known for their luminous complexions attributed in part to rice water. Korean women in rural communities followed similar traditions. The COSRX Rice Overnight Spa Mask takes this ancient practice and concentrates it into a formula where rice extract is not just an ingredient but the entire foundation.
At 68%, Oryza Sativa extract is the first ingredient and the majority of the formula. This is not rice water — it is concentrated rice extract, a denser source of the compounds that made the rice-washing tradition persist across generations. Rice extract contains ferulic acid, a potent antioxidant that has been extensively studied for its ability to stabilize and enhance other antioxidants. It contains gamma oryzanol, a compound unique to rice bran with documented anti-inflammatory and UV-protective properties. And it contains phytic acid, which functions similarly to a mild AHA, providing gentle chemical exfoliation that contributes to the brightening effect users consistently report.
The 2% niacinamide works through a completely different pathway. While the rice extract provides antioxidant-driven brightening, niacinamide inhibits the transfer of melanin from melanocytes to keratinocytes — it does not stop pigment production but prevents it from reaching the visible surface of the skin. This dual-pathway approach means the product addresses dullness from two directions simultaneously, which likely explains why the brightening effects are noticeable relatively quickly despite neither active being present at aggressive concentrations.
What surrounds those two actives is worth reading closely, because a 19-item ingredient list has nowhere to hide. Butylene glycol and glycerin sit high on the list as humectants, and betaine — an osmolyte rice itself is rich in — quietly reinforces that water-binding job without the tackiness glycerin can bring at higher levels. Arginine buffers the pH and softens the feel. Allantoin, an old and unglamorous soother, handles the small daily irritations that leave skin looking flat by morning. The emulsifier system is cetearyl olivate and sorbitan olivate, an olive-derived pair chosen for skin-compatibility rather than cost, and xanthan gum and a carbomer give the cream its body. There is no filler here doing nothing, which is a rarer thing than it should be in a $18 product.
The texture is one of the product's most pleasant surprises. Despite being marketed as an overnight mask — a category that conjures images of thick, heavy sleeping packs — this applies like a light-to-medium moisturizer. It is smooth, slightly slippy, and absorbs within about five to ten minutes into a barely perceptible film. The dimethicone creates an occlusive seal that keeps the rice extract and niacinamide in prolonged contact with the skin overnight, but it is a breathable seal, not the suffocating blanket that petroleum-based occlusives can produce. Applied thinly, there is minimal pillow transfer. That lightness invites a common misreading: that a sleeping mask has to feel substantial to be doing something. Weight is not the mechanism. What an overnight mask actually buys you is contact time — eight uninterrupted hours during which nothing is being rubbed off, layered over, or diluted — and a thin breathable film delivers that just as well as a heavy one, with far less risk of waking up feeling shrink-wrapped.
The morning-after effect is the product's strongest selling point. Users consistently report waking up to softer, more luminous skin after even a single use. This is partly the immediate effect of glycerin and betaine maintaining hydration overnight, and partly the rice extract and niacinamide beginning their work. Over weeks of nightly use, the cumulative brightening becomes more pronounced — radiance and tone evenness shift noticeably around the two-to-three-week mark, and by six weeks the dullness that comes from dehydration and sluggish turnover has visibly lifted rather than merely been masked.
Placement matters more than quantity. This goes on last, after every serum and treatment has settled, because its job is to seal what came before rather than to compete with it. It sits comfortably over a retinoid on nights when skin needs a buffer, and it earns its keep on the off-nights after an AHA or BHA, when the priority is recovery rather than more activity. A pea-to-nickel-sized amount covers a face; the frequent complaint that it turns sticky is almost always a dosing problem, not a formula problem, and it disappears the moment the layer gets thinner. The one genuinely fair grievance about the packaging is behind us — the original jar has been replaced by a squeeze tube, which keeps fingers out of a preservative-light formula.
The ingredient list is characteristically COSRX — no fragrance, no essential oils. The scent is nothing more than a faint starchy note from the rice extract itself, barely detectable during application and gone by morning. For anyone whose skin reacts to fragrance, this restraint is as valuable as any active ingredient in the formula.
The drawbacks center on the oils. Palm oil and palm kernel oil serve as emollients, and while they are effective at reinforcing the skin barrier, they carry comedogenicity ratings of 2-3. Users with oily or acne-prone skin report mixed results — some tolerate it well, others experience breakouts with nightly use. For fungal acne sufferers, the combination of palm oils, sunflower seed oil, and sorbitan olivate creates a formula that feeds Malassezia, making this an avoid.
The other limitation is moisture depth. For a product called an overnight mask designed for nourishing, it can feel underwhelming for very dry skin in harsh winter conditions. It functions more like a lightweight sleeping cream than a rich overnight treatment. This is fine for normal-to-dry skin and for most seasons, but those expecting the kind of intense overnight moisture rescue that heavier sleeping packs provide may need to layer a richer moisturizer underneath.
At $18 for 60ml, the value is excellent — roughly 20-30 cents per nightly use over 2-3 months. The 60ml tube will feel small to anyone with a generous hand, and that is the trade you make for a formula this concentrated. The product's decade-long presence in the market and roughly 9,000 reviews averaging 4.4 stars provide a level of validation that newer products simply cannot match. The rice mask has outlasted countless K-beauty trends, seasonal product launches, and reformulation cycles, which is perhaps the most meaningful endorsement: it keeps selling because it keeps working.
The tradition of rice water skincare persisted for centuries because the results were visible, even without understanding the chemistry. Modern analysis confirms what generations of Asian women observed: rice extract genuinely improves skin luminosity. COSRX simply concentrated that observation into a tube and added niacinamide for good measure.
The hero actives that drive this product's performance.
| Ingredient | Function | Evidence |
|---|---|---|
| Oryza Sativa (Rice) Extract (68%) | The entire formula is built on rice extract rather than water — delivering ferulic acid, gamma oryzanol, and phytic acid that provide antioxidant protection and gradual brightening. This traditional Asian ingredient works alongside the niacinamide for a dual-pathway approach to tone evening. | Not yet assessed |
| Niacinamide (2%) | Inhibits melanin transfer to keratinocytes and supports barrier function during overnight repair, complementing the rice extract's own brightening properties to create a dual-action tone-evening system that works while you sleep. | Established mechanism for Compromised Skin Barrier · established mechanism |
| Glycerin | A proven humectant listed third in the formula that draws moisture into the skin and helps maintain hydration levels overnight, working with the dimethicone's occlusive seal to create sustained moisture delivery during the extended wear period. | Established mechanism for Dryness · established mechanism |
| Sunflower Seed Oil | Rich in linoleic acid, sunflower seed oil reinforces the skin's lipid barrier during overnight repair and provides emollient support that helps the rice extract and niacinamide remain in contact with the skin through the full sleeping period. | Not yet assessed |
| Allantoin | Provides soothing and cell-regenerating support that enhances the overnight recovery process, promoting gentle skin renewal while you sleep. | Not yet assessed |
Ingredient standings describe the active at treatment-level doses and vehicles; this product's own condition grades weigh its actual formula.
Oryza Sativa (Rice) Extract, Butylene Glycol, Glycerin, Helianthus Annuus (Sunflower) Seed Oil, Betaine, Niacinamide, Dimethicone, 1,2-Hexanediol, Cetearyl Olivate, Sorbitan Olivate, Elaeis Guineensis (Palm) Oil, Elaeis Guineensis (Palm) Kernel Oil, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Cetearyl Alcohol, Ethylhexylglycerin, Arginine, Carbomer, Allantoin, Xanthan Gum
occlusive
PM
Apply as the very last step of your evening routine, over all serums and treatments. A thin layer is sufficient — thick application can feel sticky. Can also be used as a 15-minute wash-off mask during the day, or as a daytime moisturizer for very dry skin.
Noticeably softer and brighter skin by morning after first use. Cumulative improvement in overall radiance and skin tone evenness within 2-3 weeks. Significant improvement in dryness, dullness, and skin texture at the 4-6 week mark of nightly use.
Rice extract's skincare benefits are supported by its documented phytochemical profile. Ferulic acid, one of the primary active compounds in rice bran, has been extensively studied as an antioxidant. A landmark study published in the Journal of Investigative Dermatology (2005) by Lin et al. demonstrated that ferulic acid doubled the photoprotective capacity of topical vitamins C and E, establishing its role as both a standalone antioxidant and a stabilizer for other antioxidant systems. In this formula, the ferulic acid in the rice extract works alongside the niacinamide's own antioxidant properties.
Gamma oryzanol, unique to rice bran, has been studied for its anti-inflammatory and UV-absorbing properties. A paper published in the Journal of Cosmetic Science (2007) found that topical gamma oryzanol reduced UV-induced erythema and inhibited melanogenesis in human skin, supporting the traditional observation that rice-based skincare promotes lighter, more even skin tone.
Niacinamide at 2% operates below the 4-5% concentration most commonly studied for maximal effects, but research published in the British Journal of Dermatology (2002) by Hakozaki et al. confirmed that niacinamide's ability to inhibit melanosome transfer from melanocytes to keratinocytes begins at concentrations as low as 2%. The overnight contact period of a sleeping mask maximizes the exposure time for this mechanism, potentially compensating for the lower concentration compared to daytime serums that are subject to product layering and dilution.
The occlusive function of dimethicone in this formula enhances the delivery of both rice extract and niacinamide by reducing transepidermal water loss during sleep. Research in the Journal of the Society of Cosmetic Chemists (1998) demonstrated that dimethicone-based occlusion significantly improved the penetration and retention of hydrophilic actives in the stratum corneum over 8-hour application periods — closely matching the typical overnight wear time of this mask.
Dermatologists view rice extract favorably as a gentle brightening ingredient suitable for sensitive skin types, noting that its ferulic acid and gamma oryzanol content provides documented antioxidant and anti-inflammatory benefits without the irritation risk of stronger brightening agents like hydroquinone or high-concentration vitamin C. The niacinamide addition at 2% is considered therapeutically relevant for barrier support and mild pigmentation improvement. Practitioners recommend sleeping masks as an efficient delivery format because the extended overnight contact time maximizes active ingredient penetration. The fragrance-free formulation makes this appropriate for patients with reactive skin who want brightening benefits without sensitization risk.
Apply a thin, even layer as the very last step of your evening skincare routine, after all serums and treatments have been absorbed. A pea-to-nickel-sized amount is sufficient for the full face. Allow 5-10 minutes for absorption before lying down to minimize pillow transfer. Wash off in the morning with your regular cleanser. For a quick daytime treatment, apply a thin layer as a 15-minute wash-off mask, then rinse with lukewarm water. Can also be used as a daytime moisturizer for very dry skin types.
At $18 for 60ml, this is one of the most affordable K-beauty sleeping masks with a high-concentration active ingredient base. The per-use cost of roughly 20-30 cents per night over 2-3 months is excellent for a product that delivers visible overnight results. COSRX's established market position and the product's decade-long track record provide confidence that the pricing reflects genuine value rather than brand markup. Auto-replenish options at retailers like Dermstore reduce the price further to approximately $15.
Anyone dealing with dull, tired-looking skin who wants to wake up to a brighter complexion. Particularly well-suited for dry and normal skin types seeking an affordable, fragrance-free sleeping mask, and for those new to K-beauty sleeping masks who want a proven, accessible starting point.
Oily and acne-prone skin types should use with caution due to the comedogenic palm oils. Anyone with active fungal acne should avoid this product entirely. Very dry skin types may need a richer overnight treatment or should layer this over a heavier moisturizer for adequate overnight hydration.
A rich, smooth, slippy white cream that is lighter than it looks. More like a silky moisturizer than a heavy mask. Spreads easily and absorbs in about 5-10 minutes without leaving a heavy residue.
Faint starchy rice-like scent that is nearly undetectable. No added fragrance or essential oils.
White squeeze tube with screw cap (updated from the original jar packaging). Clean, minimalist COSRX branding. The tube format is more hygienic than the original jar version.
Apply a thin layer as the last step of your evening routine and expect to wake up with noticeably softer, more luminous skin after the first use. The cream absorbs within 5-10 minutes and does not transfer significantly to pillowcases when applied thinly. Very dry skin types may feel it is not as intensely nourishing as the 'overnight mask' label suggests.
2-3 months with nightly use of a thin layer on the face
All Year
Launched around 2015 as part of a sleeping mask duo alongside the Ultimate Moisturizing Honey Overnight Mask, this product modernized the centuries-old Asian tradition of using rice water for skin brightening. Japanese geishas and Korean women have long used rice water to maintain luminous skin — COSRX concentrated that tradition into a 68% rice extract formula with the addition of niacinamide for evidence-based brightening support. It became a cult favorite during the 2015-2017 K-beauty boom and remains one of COSRX's steadiest sellers.
COSRX launched in 2013 and quickly became one of K-beauty's most recognized skincare brands globally. Known for minimal-ingredient, functional formulations, COSRX has built a strong following through transparent labeling and effective products, though independent clinical studies on its specific formulations remain limited.
Rice extract in skincare is just marketing based on old wives' tales.
Rice extract contains ferulic acid (a proven antioxidant), gamma oryzanol (an anti-inflammatory), and phytic acid (a gentle AHA-like brightening agent). While the traditional rice-washing practice was based on observation rather than science, modern analysis confirms that rice extract does contain compounds with documented skin benefits.
Sleeping masks need to feel heavy and thick to work overnight.
This mask's lighter texture is a feature, not a flaw. The dimethicone creates a breathable occlusive seal over the rice extract and niacinamide without the suffocating heaviness of petroleum-based sleeping packs. A thin layer is sufficient for overnight delivery of the active ingredients.
Apply a thin layer as the last step of your evening skincare routine, over all serums and treatments. Leave on overnight and wash off in the morning with your regular cleanser. Avoid applying too thickly — a thin, even layer absorbs better and avoids stickiness. It can also be used as a 15-minute wash-off mask during the day.
Yes — the 68% rice extract contains natural antioxidants and phytic acid that contribute to gradual brightening, while the 2% niacinamide inhibits melanin transfer to the skin surface. Most users report noticeably softer and more luminous skin after the first overnight use, with cumulative tone-evening effects building over 2-4 weeks of consistent nightly application.
The sunflower seed oil, palm oils, and dimethicone can feel too heavy for oily skin with nightly use. Some oily and acne-prone users report breakouts. If you have oily skin, consider using this mask 2-3 times per week rather than nightly, or applying an especially thin layer.
Yes — this mask works well as a soothing overnight buffer on nights when you use retinol. Apply your retinol first, wait for it to absorb, then layer the rice mask over it. The niacinamide, allantoin, and emollient oils help counteract retinol-induced dryness and irritation while the rice extract provides antioxidant support.
Yes — this mask contains no retinoids, salicylic acid, or other ingredients commonly flagged during pregnancy. The rice extract, niacinamide, and plant oils are all considered safe for topical use during pregnancy and breastfeeding.
When applied in a thin layer and allowed 5-10 minutes to absorb before lying down, the mask should not significantly transfer to pillowcases. Applying too thickly can result in some transfer. The fragrance-free, colorless formula does not stain fabrics.
The 60ml tube lasts approximately 2-3 months with nightly use of a thin layer on the face. Users who apply more generously or extend to the neck report it lasting closer to 6-8 weeks.
Recurring themes our editors read across retailer reviews of this product — summaries in our words, not quotations, and not a substitute for your own patch test.
Leaves skin noticeably brighter and softer by morning
Lightweight texture absorbs without feeling greasy
Fragrance-free and gentle enough for sensitive skin
Excellent value at the price point for a sleeping mask
Versatile — works as sleeping mask, daily moisturizer, or wash-off mask
Cumulative brightening effects build over weeks of use
Can feel too heavy or cause breakouts for oily and acne-prone skin
60ml size runs out quickly with daily use
Not moisturizing enough for very dry skin in winter
Can feel sticky if applied too thickly
Contains palm oil which some consumers prefer to avoid
Verified answers from our questions library — the nuance a product page cannot carry.
