COSRX ULTIMATE NOURISHING RICE OVERNIGHT SPA MASK

100% Genuine (Adilsons policy) · Fragrance-Free (confirmed in the declared INCI) · FA-Conditional (see Sensory and Chemical Profile) · Halal-Friendly* / Vegan-Friendly*.

Pros: genuinely rich rice-extract base, real (if trace-level) niacinamide for tone, works as a true "sleep in it" occlusive step. Caveats: contains palm-derived oils and olive-derived emulsifiers that are FA-conditional, and its richness makes it unsuitable as a nightly product for most people in Mauritius humidity.

Mauritius humidity makes surface sebum feel like dirt, tempting over-washing that strips the acid mantle and triggers compensatory oil production. On nights when skin genuinely needs deep repair (post-sun, post-travel, post-air-conditioning marathon), this mask's rich occlusive layer helps rebuild what over-cleansing or environmental stress has stripped — but it is not the daily-maintenance answer to over-cleansing; a lighter moisturizer handles that role most nights.

Bedside-compatible: yes, in the sense that you apply and go straight to sleep with no rinsing needed until morning. However, it does require a slightly more deliberate application (thin, even layer) than a quick pat-on lotion, so it's a "planned" self-care step rather than a true zero-effort fallback.

Step 1 (When): PM only, 2-3 nights per week rather than nightly. Step 2 (How much): A thin, even layer — more like a mask than a moisturizer. Step 3 (How): Apply as the final step of your PM routine and leave on overnight; rinse or wipe off in the morning if any residue remains.

Introduce this as the ONLY new product in your routine. Wait a full 14 days before adding anything else. This isolation window ensures you can identify whether any reaction is caused by this specific product.

1. Double cleanse → 2. Toner/essence (optional) → 3. Treatment serum (optional) → 4. Lighter moisturizer (optional, on very dry nights) → 5. COSRX Ultimate Nourishing Rice Overnight Spa Mask as the final overnight seal, in place of a standard moisturizer on treatment nights. It carries no active lane beyond trace niacinamide, so it does not conflict with acids or retinoids used earlier in the week.

Technique: Pat/press into skin; do not rub. Required skin state: after your normal PM routine, on top of whatever you've already applied. Wait time: none — this is the final step; wash off in the morning.

This is an encyclopedia map of all product types. You do not use all of these daily. You select modules based on your skin state.

Global rules: viscosity ladder thinnest → thickest, water-phase before oil-phase, treatments before seals. Sleeping masks sit at the very end of the PM stack, on dry, or barrier-support nights specifically.

PM Maximum Stack: 1. Micellar pre-cleanse (optional) 2. Oil cleanser (if SPF/makeup) 3. Water cleanser 4. Toner/essence (optional) 5. Soothing/barrier serum (optional) 6. Anchor active (optional, only on non-mask nights) 7. Targeted serum (optional) 8. Moisturizer (lighter, on non-mask nights) 9. Sleeping mask — this product's slot, dry/dehydrated/barrier-support nights only 10. Spot treatment/patch (as needed). Do not layer retinoids with AHA/BHA in the same night; keep "one lane" per night.

One-lane rule: this mask carries no meaningful active lane and can follow any active-serum night, but should replace (not stack on top of) a standard rich moisturizer the same night.

Thick cream/balm tier — the heaviest, final step of the routine. Apply after every thinner water-based and serum layer, never before them.

Deep dehydration: rice extract, Glycerin, Betaine, and Arginine hold water at the surface. Barrier recovery: Allantoin and the occlusive oil/silicone layer reduce transepidermal water loss overnight. Mild tone-evening: Niacinamide is present, though at an undisclosed (likely supporting, not headline) concentration.

This product cannot replace a targeted acne or pigmentation treatment, and its occlusive richness is not appropriate as a daily step for most oily or fungal-acne-prone skin.

Everyday lighter moisturizer for non-mask nights: primary — COSRX Oil-Free Ultra Moisturizing Lotion; alternatives — Anua Birch Moisture Boosting Cream 50ml, Beauty of Joseon Dynasty Cream 50ml, SKIN1004 Madagascar Centella Probio-Cica Enrich Cream 50ml.

Hydrating essence to layer before it on mask nights: primary — COSRX Advanced Snail 96 Mucin Power Essence 100ml; alternatives — SKIN1004 Madagascar Centella Ampoule 55ml, Beauty of Joseon Calming Serum: Green Tea + Panthenol 30ml, Anua Heartleaf 80% Moisture Soothing Ampoule 30ml.

MYTH: "A sleeping mask should replace your regular moisturizer every night." REALITY: most sleeping masks, including this one, are richer than a daily moisturizer by design — using it nightly in humid climates often causes congestion for combination-to-oily skin.

MYTH: "Rice extract alone will brighten skin dramatically." REALITY: rice extract's benefit here is primarily hydration and softness; any brightening comes from the smaller, undisclosed-concentration niacinamide addition.

Mauritius tap water hardness varies by region; rinsing this mask off thoroughly in the morning avoids compounding hard-water residue with the mask's own richness.

Full INCI: Oryza Sativa (Rice) Extract, Butylene Glycol, Glycerin, Helianthus Annuus (Sunflower) Seed Oil, Betaine, Niacinamide, Dimethicone, 1,2-Hexanediol, Cetearyl Olivate, Sorbitan Olivate, [--- Estimated 1% Line ---] Elaeis Guineensis (Palm) Oil, Elaeis Guineensis (Palm) Kernel Oil, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Cetearyl Alcohol, Ethylhexylglycerin, Arginine, Carbomer, Allantoin, Xanthan Gum.

Preservative system: 1,2-Hexanediol and Ethylhexylglycerin (glycol-based preservative boosters).

Fragrance status: Fragrance-Free. Scent: effectively none, possibly a faint neutral rice/oil note. EU 26 allergen screen: none detected. Alcohol: Alcohol-Free (Cetearyl Alcohol present is a fatty alcohol, moisturizing rather than drying).

Halal: *Self-assessed by Adilsons based on available INCI data. No ethanol from fermentation and no animal-derived ingredients detected. This is NOT a formal Halal certification.

Vegan: *Self-assessed by Adilsons based on available INCI data. No animal-derived ingredients detected. This is NOT a formal vegan certification.

Cruelty-free: *Brand-stated policy, not independently certified by PETA or Leaping Bunny. COSRX sells through mainland Chinese retail channels, where post-market animal testing may be legally required; cross-border e-commerce sales may be exempt.

Microplastic-Free: No — contains Dimethicone, a silicone polymer. Not currently restricted under EU microplastic rules, but noted for readers who avoid all silicones.

MFDS classification: General Cosmetic — no functional-ingredient concentration disclosed. Evidence confidence: Medium — rice extract and the general "overnight mask" occlusive-hydration category have broad ingredient-literature support, but no product-specific clinical trial was found for this exact formula.

Fungal Acne Safety: FA-Conditional. Elaeis Guineensis (Palm) Oil and Palm Kernel Oil are relatively high in Malassezia-feeding fatty acids, and Cetearyl Olivate/Sorbitan Olivate are olive-derived emulsifiers some community trackers flag as conditional. FA-reactive users should patch test on the jawline before full-face overnight use.

Assessment: Low for its intended use (final overnight step, nothing applied on top), but High if you try to layer anything else over it — this mask is designed to be the last thing you apply.

Fresh color is off-white to pale cream. A yellowed shift or rancid smell (from the plant-oil content oxidizing) signals spoilage — discard rather than use. Store away from direct bathroom-window sun and shower steam; Mauritius bathroom humidity accelerates jar-format degradation.

Patch test on the inner forearm for 24 hours, then behind the ear for 24 hours, before first facial use — particularly if you are fungal-acne-prone, given the palm-oil and olive-emulsifier content.

If adverse reaction: STOP ALL ACTIVES. For 72 hours, use ONLY a gentle cleanser, plain moisturizer, and mineral SPF. After 72 hours, reintroduce ONE product per 14 days. Seek emergency care for hives, swelling, blistering, persistent burning, or breathing difficulty.

1. Using it nightly instead of as a periodic treatment. 2. Applying a thick layer meant for a rinse-off mask instead of a thin overnight layer. 3. Using it on already-congested or actively breaking-out skin. 4. Skipping the patch test if fungal-acne-prone. 5. Layering another rich cream underneath it, which compounds heaviness unnecessarily.

At a thin layer used 2-3 nights per week, a standard jar lasts roughly 2-3 months. Reorder about 2 weeks before it visibly runs low.

PM (mask nights only, 2-3x/week): Double cleanse → toner/essence (optional) → treatment serum (optional) → this mask as the final step, in place of your usual moisturizer. PM (non-mask nights): use your regular lighter moisturizer instead.

If your skin is dry and barrier-stressed: this mask is well-suited 2-3x/week. If you are oily, combination, or fungal-acne-prone: patch test first and start at 1x/week, watching closely for congestion.

Stock-true bundle — Deep Overnight Repair: this mask + COSRX Advanced Snail 96 Mucin Power Essence 100ml. How to use: essence on damp skin, mask sealed on top, 2-3 nights a week. Why included: layering a lighter hydration essence underneath this rich mask maximizes the overnight repair without needing a separate heavy moisturizer too.

After purchasing, you will receive our skincare education email series covering this product in depth.

The recommendations above are based on formulation synergy with Ultimate Nourishing Rice Overnight Spa Mask, not on margin or stock levels. If a pairing does not exist in our catalog, we say so. If you already own a product that fills the same role, use what you have first.

If you want a lighter overnight treatment without palm-derived oils, Anua Heartleaf Cream Mask Night Solution 25ml is a genuine in-catalog alternative built on a Heartleaf and ceramide base rather than rice and palm oil.

Choose this COSRX mask for a richer, more occlusive overnight treatment on genuinely dry, barrier-stressed nights; choose the Anua Heartleaf Cream Mask if you want a lighter overnight step or want to avoid palm-derived oils specifically.

If you are fungal-acne-prone or want a lighter single-use format: the Anua Heartleaf Cream Mask is the better fit. If your skin is genuinely dry and tolerates rich textures well: this COSRX mask delivers more intensive overnight nourishment.

If you match 2 or more upgrade triggers above, the alternative is worth choosing. If not, this mask is sufficient. Consistency beats complexity.

This product's PRIMARY function is periodic intensive overnight hydration and barrier support. You do not need this if you already own an unfinished sleeping mask doing the same job — finish it first. Stacking assessment: No Benefit if paired with another rich overnight mask on the same night (redundant, and increases congestion risk); Significant Benefit if paired with a lighter hydration essence underneath on mask nights.

This product is sourced through authorized Korean distributors — primarily Craver Co., Ltd (South Korea), alongside other verified distribution partners. Craver is a major Korean beauty distributor and the parent company of SKIN1004, handling authorized distribution for multiple K-beauty brands. All products are shipped directly to Mauritius via verified channels.

For comprehensive information about how we verify authenticity, our layered verification system, and how to check your product at home, visit our dedicated Authenticity and Trust page.

Quick checks for this SKU: genuine jars carry a laser-etched batch code on the base, and COSRX's official QR verification tool at official.cosrx.com/record can confirm current-generation stock.

COSRX built its early reputation on a minimal, low-pH, "skin-friendly" formulation ethos before its 2023 acquisition by Amorepacific. This mask extends that philosophy into a richer, occasional-use overnight format built around a high concentration of a single hero botanical extract, a pattern the brand repeats across several of its lines.

Third-party review sources (What's In My Jar, ohlolly.com, christinahello.com) describe positive sentiment around softness, hydration, and suitability for sensitive skin, with reviewers praising the lightweight-feeling nourishment despite the rich formula. No aggregate numeric rating specific to this exact SKU, and no dedicated Reddit thread, was found in this research pass.

Common praise: makes skin feel soft, hydrated, and nourished by morning. Common complaint: not clearly identified in the sources checked this pass — worth a fresh check on a future research cycle, particularly for congestion-related feedback given the FA-conditional oil content.

Sustainability: check the base for a plastic recycling code; not refillable.

How often should I use this? 2-3 nights per week as an intensive treatment, not nightly, especially in Mauritius humidity.

Do I need to rinse it off? Rinse or wipe off any residue in the morning; it's not designed to fully absorb overnight.

Can fungal-acne-prone skin use it? With caution — it contains palm oils and olive-derived emulsifiers that some FA-safety trackers flag as conditional. Patch test first.

Will it brighten my skin? It contains niacinamide at an undisclosed concentration — treat any brightening as a secondary, not primary, benefit.

Is it vegan? Self-assessed yes based on the declared INCI.

Occlusive

An ingredient or product that forms a physical film to slow water loss overnight.

Humectant

An ingredient that draws water toward the skin surface.

Fungal Acne (FA)-Conditional

Contains an ingredient some, but not all, fungal-acne-prone people react to.

Overnight/Sleeping Mask

A rich, leave-on treatment applied as the final PM step, left on until morning.

Every product sold by Adilsons Beauty is 100% genuine, sourced through authorized Korean distribution channels. Full details on our verification system: Authenticity and Trust.

Our team is available to help you build a routine, troubleshoot reactions, and answer ingredient questions. WhatsApp: +230 5 778 2336.

For in-depth skincare education, visit our blog at adilsons.mu/blogs/k-beauty or subscribe to our email to get our guided education series delivered to your inbox.

Coverage: Island-wide delivery (Mauritius).

Processing and Timing: Orders process in 1-2 business days; usually ready by Day 3 for pickup by our delivery partners/regional team. Partner collection can take up to 1 week. After pickup, delivery typically takes 1-5 business days (weekdays only).

Express: May be available by region; request on WhatsApp: +230 5 778 2336.

Liquids/Sensitive Items: Serums, toners, liquid makeup (and kits containing liquids) are pickup or door-to-door only; checkout enforces this.

Scheduling: Deliveries run by region on set schedules; we will contact you the evening before.

Pickup: Citadelle Mall pickup available.

Returns: No change-of-mind exchanges.

Refunds (Summary): For defective/damaged on receipt (report within 48h), wrong item, or manufacturing defect within 6 months. Refunds via bank transfer (7-10 business days); card refunds may incur a 5% processor fee (fee not charged for defects/order errors). Opened skincare/personal-care items are non-returnable (except if damaged on delivery).

Source of Truth: This is a quick snapshot. If anything differs, the policy pages are final.

Store Policies: For the most up-to-date information, please review our Shipping Policy and Refund Policy.

Best for: genuinely dry or barrier-stressed skin that wants a rich, occasional overnight treatment rather than a daily moisturizer.

Key benefits: a real high-concentration rice-extract base, fragrance-free, meaningful occlusive overnight repair.

Keep in mind: contains FA-conditional palm oils and olive-derived emulsifiers, is too rich for nightly use in Mauritius humidity for most skin types, and its niacinamide concentration is undisclosed.