Ultimate The Mask

Sensai

Where to buy Possibly in stock

About this product

The Sensai Ultimate The Mask is a leave on & sleeping mask. Our analysis of its 47 ingredients (29 low-risk) rates it Excellent (92/100). Based on its ingredients, it looks well-suited to oily / acne-prone and dry skin. Heads up: it contains fragrance, which can irritate sensitive or reactive skin.

Reef-safe

Summarised from our ingredient analysis — not brand marketing copy.

At a glance

Type
Leave On & Sleeping Masks
Ingredients
47
Low-risk
29
Fragrance
Contains fragrance
Origin
Japan

The evidence

Quick Product Notes

Paraben-Free Sulfate-Free Alcohol-Free Silicone-Free EU Allergen-Free Fungal Acne (Malassezia) Safe

Notable Effects & Ingredients

No Notable Effects & Ingredients

Ingredients Related to Skin Types

Good   Bad — tap a skin type to see which ingredients · estimated from ingredient functions
Dry Skin 12/5
Good for dry skin
Glycosyl Trehalose Glyceryl Stearate Behenyl Alcohol Cetearyl Alcohol Squalane Butylene Glycol Glycerin Hydrogenated Starch Hydrolysate Hydrolyzed Silk Hydrogenated Polydecene Dimethicone PEG-75
Caution for dry skin
Sodium Stearoyl Glutamate Stearic Acid Glycerin Alcohol Vaccinium Myrtillus Leaf Extract
Oily/Acne-Prone Skin 2/0
Good for oily/acne-prone skin
Alcohol Vaccinium Myrtillus Leaf Extract
Sensitive Skin 3/17
Good for sensitive skin
Glycosyl Trehalose Glycerin Dimethicone
Caution for sensitive skin
Dipropylene Glycol Nasturtium Officinale Extract Stearic Acid Ammonium Glycyrrhizate Eucalyptus Globulus Leaf Extract Butylene Glycol Glycerin Alcohol Hydrogenated Polydecene Sodium Benzoate Phenoxyethanol Linalool Citronellol Alpha-Isomethyl Ionone Limonene Benzyl Benzoate Geraniol

Ingredients list

47 total
Lower hazard (1) Higher hazard (7)
All47 Skin Conditioning32 Fragrance15 Masking10 Solvent9 Hair Conditioning9 Emulsion Stabilising9 Humectant8 Viscosity Controlling7
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
2
A
Hydrogenated Polydecene
(Fragrance, Hair Conditioning, Skin Conditioning, Emollient, Solvent)
1
A
Squalane
(Emollient, Hair Conditioning, Refatting, Skin Conditioning)
1
A
Behenyl Alcohol
(Binding Agent, Emulsion Stabilising, Viscosity Increasing Agent, Binding, Emollient, Viscosity Controlling)
2
A
Glycerin
(Denaturant, Fragrance, Hair Conditioning, Humectant, Oral Care Agent, Oral Health Care Drug, Skin Protecting, Viscosity Decreasing Agent, Perfuming, Solvent)
Good for Dry Skin
Good for Dry Skin
Fungal Acne
Fungal Acne Trigger
1
A
Dipropylene Glycol
(Fragrance, Solvent, Viscosity Decreasing Agent, Masking, Viscosity Controlling)
1
A
Cetearyl Alcohol
(Emulsion Stabilising, Opacifying, Foam Boosting, Viscosity Increasingagent Aqueous, Viscosity Increasing Agent, Emollient, Emulsifying, Viscosity Controlling)
3
A
Dimethicone
(Antifoaming Agent, Skin Protecting, Emollient, Skin Conditioning)
Silicone
Silicone
1
A
Stearic Acid
(Fragrance, Sufactant, Emulsifying, Surfactantsurfactant Cleansing Agent Is Included As A Function For The Soap Form Of Stearic Acid., Emulsion Stabilising, Masking, Refatting)
Bad for Oily Skin
Bad for Oily Skin
Fungal Acne
Fungal Acne Trigger
3
A
PEG-75
(Binding Agent, Humectant, Solvent)
1
B
Sodium Stearoyl Glutamate
(Hair Conditioning, Skin Conditioning, Surfactant Cleansingagent, Emulsifying)
1
A
Glyceryl Stearate
(Emollient, Emulsifying)
Fungal Acne
Fungal Acne Trigger
1
A
Butylene Glycol
(Fragrance, Skin Conditioning, Solvent, Viscositydecreasing Agent, Humectant, Masking, Viscosity Controlling)
Good for Dry Skin
Good for Dry Skin
4
A
Phenoxyethanol
(Fragrance, Preservative)
Paraben
Paraben
1
A
Phytosteryl Macadamiate
(Hair Conditioning, Skin Conditioning)
1
A
Ammonium Glycyrrhizate
(Flavoring Agent, Fragrance, Skin Conditioning, Masking)
PARFUM
(Fragrance, Perfuming)
1
A
Hydroxyethylcellulose
(Binding Agent, Emulsion Stabilising, Film Forming, Viscosity Increasing Agent, Binding, Stabilising, Viscosity Controlling)
2
Alcohol
(Antifoaming Agent, Antimicrobial, Astringent, Masking, Solvent, Viscosity Controlling)
Bad for Dry Skin
Bad for Dry Skin
Bad for Sensitive Skin
Bad for Sensitive Skin
Methylserine
(Skin Conditioning)
1
Acetyl Glucosamine
(Skin Conditioning)
1
Glycosyl Trehalose
(Binding Agent, Emulsion Stabilising, Film Forming, Humectant, Skin Protecting)
1
A
Disodium EDTA
(Chelating Agent, Viscosity Controlling)
1
A
Hydrogenated Starch Hydrolysate
(Humectant, Oral Care Agent)
6
A
Benzyl Benzoate
(Fragrance, Solvent, Antimicrobial, Masking)
Allergens
Allergens
1
A
Niacinamide
(Hair Conditioning, Skin Conditioning, Smoothing)
5
Linalool
(Fragrance, Deodorant, Masking)
Allergens
Allergens
Dimethoxy Di-P-Cresol
(Antioxidant, Skin Conditioning)
5
Alpha-Isomethyl Ionone
(Perfuming, Skin Conditioning)
Allergens
Allergens
5
Citronellol
(Fragrance, Masking)
Allergens
Allergens
Eugenia Caryophyllus Flower Extract
(Astringent, Fragrance, Oral Care, Tonic)
6
Limonene
(Deodorant, Perfuming, Solvent)
Allergens
Allergens
1
A
Hydrolyzed Silk
(Hair Conditioning, Skin Conditioning, Antistatic Agent, Humectant)
1
Saxifraga Sarmentosa Extract
(Skin Conditioning)
Prunus Yedoensis Leaf Extract
(Skin Conditioning)
1
Nasturtium Officinale Extract
(Perfuming, Skin Conditioning)
7
Geraniol
(Fragrance, Masking, Tonic)
Allergens
Allergens
Geranium Thunbergii Flower/Leaf/Stem Extract
(Skin Conditioning)
1
Hydrolyzed Lupine Protein
(Antistatic Agent, Hair Conditioning, Skin Conditioning)
HAMAMELIS VIRGINIANA LEAF EXTRACT
(Skin Conditioning)
1
Zostera Marina Extract
(Skin Conditioning)
1
Eucalyptus Globulus Leaf Extract
(Perfuming, Skin Conditioning)
Bad for Sensitive Skin
Bad for Sensitive Skin
Pyracantha Fortuneana Fruit Extract
(Skin Conditioning)
Vaccinium Myrtillus Leaf Extract
(Astringent, Hair Conditioning, Nail Conditioning, Skin Conditioning)
TOCOPHEROL
(Antioxidant, Fragrance, Skin Conditioning)
3
A
Sodium Benzoate
(Fragrance, Preservative, Anticorrosive, Masking)
Cynara Scolymus Leaf Extract
(Skin Conditioning)

My Ingredient Notes

No personal ingredient notes yet. Save ingredients to your profile to get good/bad alerts here.

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Key ingredients

Hydrogenated Polydecene
Skin Conditioning, Emollient
Squalane
Emollient, Skin Conditioning
Behenyl Alcohol
Emollient
Glycerin
Humectant, Skin Protecting
Cetearyl Alcohol
Emollient
Dimethicone
Skin Protecting, Emollient

Benefits

Good for dry skin
Good for oily/acne-prone skin

Concerns

Contains paraben
Contains silicone
Contains eu allergen
Not fungal acne (malassezia) safe
Geraniol — higher EWG
May not suit sensitive skin

EWG flags hazard, not real-world risk — ratings don't account for how much of an ingredient a product contains. Treat these as things to research, not verdicts. How we score →

Ingredients explained

Water
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
Hydrogenated Polydecene
Fragrance, Hair conditioning
Low-hazard ingredient.Read moreShow less
EWG 2 CIR A FragranceHair conditioningSkin conditioningEmollientSolvent
Squalane
Emollient, Hair conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A EmollientHair conditioningRefattingSkin conditioning
Behenyl Alcohol
Binding agent, Emulsion stabilising
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Binding agentEmulsion stabilisingViscosity increasing agentBindingEmollientViscosity controlling
Dipropylene Glycol
Fragrance, Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A FragranceSolventViscosity decreasing agentMaskingViscosity controlling
Cetearyl Alcohol
Emulsion stabilising, Opacifying
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Emulsion stabilisingOpacifyingFoam boostingViscosity increasingagent - aqueousViscosity increasing agentEmollientEmulsifyingViscosity controlling
PEG-75
Binding agent, Humectant
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A Binding agentHumectantSolvent
Sodium Stearoyl Glutamate
Hair conditioning, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B Hair conditioningSkin conditioningSurfactant - cleansingagentEmulsifying
Phytosteryl Macadamiate
Hair conditioning, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Hair conditioningSkin conditioning
Ammonium Glycyrrhizate
Flavoring agent, Fragrance
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Flavoring agentFragranceSkin conditioningMasking
PARFUM
Fragrance, Perfuming
Limited public safety data.Read moreShow less
EWG N/A FragrancePerfuming
Hydroxyethylcellulose
Binding agent, Emulsion stabilising
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Binding agentEmulsion stabilisingFilm formingViscosity increasing agentBindingStabilisingViscosity controlling
Methylserine
Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Skin conditioning
Acetyl Glucosamine
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
Glycosyl Trehalose
Binding agent, Emulsion stabilising
Low-hazard ingredient.Read moreShow less
EWG 1 Binding agentEmulsion stabilisingFilm formingHumectantSkin protecting
+ 18 more — see the full ingredients list above
Glycerin
Denaturant, Fragrance
Low-hazard ingredient.Read moreShow less
EWG 2 CIR A DenaturantFragranceHair conditioningHumectantOral care agentOral health care drugSkin protectingViscosity decreasing agentPerfumingSolvent Good for Dry SkinFungal-acne trigger
Dimethicone
Antifoaming agent, Skin protecting
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A Antifoaming agentSkin protectingEmollientSkin conditioning Silicone
Stearic Acid
Fragrance, Sufactant
Potentially comedogenic - can block poresRead moreShow less
EWG 1 CIR A FragranceSufactantEmulsifyingSurfactantsurfactant-cleansing agent is included as a function for the soap form of stearic acid.Emulsion stabilisingMaskingRefatting Bad for Oily SkinFungal-acne trigger
Glyceryl Stearate
Emollient, Emulsifying
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A EmollientEmulsifying Fungal-acne trigger
Butylene Glycol
Fragrance, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A FragranceSkin conditioningSolventViscositydecreasing agentHumectantMaskingViscosity controlling Good for Dry Skin
Phenoxyethanol
Fragrance, Preservative
Low-to-moderate hazard.Read moreShow less
EWG 4 CIR A FragrancePreservative Paraben
Alcohol
Antifoaming agent, Antimicrobial
Causes moisture evaporation - prone to dry out skinRead moreShow less
EWG 2 Antifoaming agentAntimicrobialAstringentMaskingSolventViscosity controlling Bad for Dry SkinBad for Sensitive Skin
Benzyl Benzoate
Fragrance, Solvent
Moderate-hazard ingredient.Read moreShow less
EWG 6 CIR A FragranceSolventAntimicrobialMasking Allergens
Linalool
Fragrance, Deodorant
Moderate-hazard ingredient.Read moreShow less
EWG 5 FragranceDeodorantMasking Allergens
Alpha-Isomethyl Ionone
Perfuming, Skin conditioning
Moderate-hazard ingredient.Read moreShow less
EWG 5 PerfumingSkin conditioning Allergens
Citronellol
Fragrance, Masking
Moderate-hazard ingredient.Read moreShow less
EWG 5 FragranceMasking Allergens
Limonene
Deodorant, Perfuming
Moderate-hazard ingredient.Read moreShow less
EWG 6 DeodorantPerfumingSolvent Allergens
Geraniol
Fragrance, Masking
Higher-hazard ingredient.Read moreShow less
EWG 7 FragranceMaskingTonic Allergens
Eucalyptus Globulus Leaf Extract
Perfuming, Skin conditioning
Potentially a skin irritantRead moreShow less
EWG 1 PerfumingSkin conditioning Bad for Sensitive Skin

How to use

How to use

  • 1 Morning & evening: Suitable for both AM and PM use.

General guidance from this product's category and active ingredients — always follow the directions on the package.

Trust & honesty

Effective levels — general guide

The concentrations these actives are typically effective at in research — not a measurement of this product.

Niacinamide 2–5% (up to 10%)

Most research uses 2–5%; some formulas go to 10%. Very high levels can cause flushing in sensitive skin.

Niacinamide

INCI lists don't disclose amounts, and we don't claim to know this product's levels — these are the ranges these ingredients are usually effective at, so you can tell a real formula from "fairy-dusting" a marketed active. How we estimate this.

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