1st on the list, which puts it at an estimated 30–80% of the formula.
Aqua (EU),Deionized Water,Distilled Water,Micromatrix Fractile AN,Onsen-Sui (JPN),Purified Water
111Skin
Y Theorem Bio Cellulose Facial Mask Box
face mask
111Skin
face mask
Added Last edited
Fit by skin type
General, ingredient-based — not your personalized match.
See how this fits your skin
Take the skin test and I'll show you how suitable this product is for you.
Take the skin testLike a stint in a spa when your skin's showing signs of fatigue, 111SKIN's Y Theorem Bio Cellulose Facial Mask works to quickly replenish, recharge and awaken dulled, lacklustre skin types. Infused with a cocktail of strengthening complexes, inspired by wound-healing processes, these bio-cellulose masks have a 'second skin' benefit. Not only do they assist the penetration of the stimulating they are filled with regenerative ingredients too. With fibres 500x finer than tissue masks, bio-cellulose helps to 'lock in' hydration, delivering powerful actives to where they're most needed. With sea anemone peptides (a biomimetic peptide that calms inflammation and soothes irritation) alongside ectoin and centella Asiatic which shield against aggressors, the star is the N-Acetyl Cysteine. As a skin conditioning component, it wards against aggressors and performs a vital role in the creation of collagen and elastin.
Y Theorem Bio Cellulose Facial Mask Box is a lightweight mask from 111Skin. The formula is built mainly around hydration. The ingredient list runs to 35 ingredients, each broken down in full below.
By its ingredient list the formula reads as light: water and humectants lead, with emollients kept lower in the order. Hydration is handled by Glycerin, Butylene Glycol and Trehalose, humectants that pull water into the upper layers of skin rather than sealing it there.
Hydration: Very high. Ingredients that pull and hold water in the upper layers of skin, and here that comes from Glycerin, Butylene Glycol, Trehalose and Panthenol.
Soothing: Moderate. Ingredients aimed at visible redness and reactivity, and here that comes from Ectoin, Panthenol, Allantoin and Centella Asiatica Leaf Extract.
Brightening: Moderate. Ingredients that act on uneven tone and post-inflammatory marks, and here that comes from Ammonium Glycyrrhizate, Magnesium Ascorbyl Phosphate, Glycyrrhiza Glabra Root Extract and Ectoin.
On richness alone it suits Balanced, Combination (oily) and Oily skin best, and is the least natural fit for Dry and Combination (dry) skin. Nothing in the list is flagged as a common irritant, which is a reasonable starting point for reactive skin — though a patch test is still the only way to know.
The formula contributes little or nothing on oil control, cell renewal and firmness signalling. That is not a fault — most products are not meant to do everything — but if one of those is your priority, this is not the product that will address it.
Reading the full list, the formula is essential-oil-free, paraben-free, silicone-free, microplastic-free, sulfate-free and dye-free. Those claims come from the ingredient list itself, not from the packaging. It does contain fragrance and drying alcohol, worth knowing if your skin reacts to any of them.
It can be used morning and evening. In a routine it goes after serums. Seal in your serums with it; in the morning, sunscreen still goes on top.
This summary is generated from the product's ingredient list. It is not a review, it is not the brand's own marketing claims, and it does not replace advice from a dermatologist.
Drawn purely from the ingredient list
Scored on how rich or light the formula reads from its INCI order.
No ingredient in this formula carries a common-irritant flag, making it a reasonable option for reactive skin. A patch test is still recommended, as individual skin reactivity varies.
Based on the curated benefits documented for this product's ingredients.
Attracts and locks in moisture to keep skin plump and dewy
Boosts collagen and cell turnover to reduce fine lines and wrinkles
Calms redness, irritation, and inflammation for sensitive skin
Brightens and balances complexion for a more uniform appearance
Regulates sebum production to reduce shine and greasiness
None of the ingredients in this formula are associated with these benefits. This is not unusual, as most products are designed to target a limited number of concerns.
The actives, UV filters and benefit-carrying ingredients in this formula, in the order they are listed.
1st on the list, which puts it at an estimated 30–80% of the formula.
Aqua (EU),Deionized Water,Distilled Water,Micromatrix Fractile AN,Onsen-Sui (JPN),Purified Water
2nd on the list, which puts it at an estimated 5–20% of the formula.
Glycerine ;Glycerol (INN); Glycerol (RIFM); Glycerolum (EP); Glycyl Alcohol; 1,2,3-Propanetriol; 1,2,3-Trihydroxypropane
3rd on the list, which puts it at an estimated 5–20% of the formula.
Butane-1,3-diol (CAS No. 107-88-0/ EC No. 203-529-7) (R)-(-)-butane-1,3-diol” (CAS No. 6290-03-5/ EC No. 228-532-0)
4th on the list, which puts it at an estimated 2–10% of the formula.
D-Mannitol
5th on the list, which puts it at an estimated 2–10% of the formula.
Ammonium glycyrrhizate
6th on the list, which puts it at an estimated 2–10% of the formula.
alpha-D-Glucopyranoside, alpha-D-glucopyranosyl
7th on the list, which puts it at an estimated 1–5% of the formula.
Ethanol
8th on the list, which puts it at an estimated 1–5% of the formula.
4-Pyrimidinecarboxylic Acid, 1,4,5,6,-Tetrahydro-2-Methyl-, (4S)-
9th on the list, which puts it at an estimated 1–5% of the formula.
Butanamide, 2,4-dihydroxy-N-(3-hydroxypropyl)-3,3-dimethyl-, (2R)-; dl-Panthenol
10th on the list, which puts it at an estimated 1–5% of the formula.
Castor oil (Ricinus communis), hydrogenated, ethoxylated (60 mol EO average molar ratio)
12th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
1H-Purine-2,6-dione, 3,7-dihydro-1,3,7-trimethyl-
14th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
bis(D-Gluconato-O1,O2)zinc
Each axis is scored from the ingredients present and how high up the list they sit.
Ingredients that pull and hold water in the upper layers of skin
Lipids and repair signals that support skin barrier integrity
Ingredients that mop up free radicals from UV and pollution
Ingredients that moderate sebum or absorb shine
Ingredients that act on uneven tone and post-inflammatory marks
Ingredients aimed at visible redness and reactivity
Retinoids, acids and enzymes that speed surface turnover
Peptides and growth factors that signal for collagen support
"Active" here means an ingredient carrying a recorded active type or a recognised UV filter.
Solvents, emollients, texture agents and preservatives — the formula that carries the actives.
Read from the full ingredient list. A brand's own claim may differ.
Benzyl Alcohol
Alcohol
Prunus Armeniaca Kernel Oil
Silk Amino Acids
Judged by the same curated rules our routine checker uses. It reads the ingredients, not the label.
Nothing in this formula belongs to a group our rules can put in conflict, so it layers freely. Order still matters — thinnest texture first.
This product is the "Moisturise" step.
Flags to check, not verdicts. None of this is medical advice — if you are pregnant, breastfeeding or treating a skin condition, ask a doctor.
Most ingredients do more than one job, so these counts add up to more than the 35 ingredients on the label.
Sets the thickness, spread and stability of the formula
Draws water into the upper layers of skin
Botanical material, usually for antioxidants or scent
Keeps the product free of microbial growth
Dissolves and carries everything else
Changes how skin behaves rather than how it feels
Forms a film that slows water loss
Neutralises free radicals from UV and pollution
Calms visible redness and irritation
Lifts oil and dirt, or holds oil and water together
Changes how the product smells or looks
Softens and smooths by filling gaps between skin cells
Binds trace metals that would otherwise spoil the formula
Amino-acid chains that signal for repair or firmness
Sets the acidity the formula needs to work
Every ingredient on the label, in order, with what it does and roughly how much of it is likely to be there.
1st on the list, which puts it at an estimated 30–80% of the formula.
Aqua (EU),Deionized Water,Distilled Water,Micromatrix Fractile AN,Onsen-Sui (JPN),Purified Water
2nd on the list, which puts it at an estimated 5–20% of the formula.
Glycerine ;Glycerol (INN); Glycerol (RIFM); Glycerolum (EP); Glycyl Alcohol; 1,2,3-Propanetriol; 1,2,3-Trihydroxypropane
3rd on the list, which puts it at an estimated 5–20% of the formula.
Butane-1,3-diol (CAS No. 107-88-0/ EC No. 203-529-7) (R)-(-)-butane-1,3-diol” (CAS No. 6290-03-5/ EC No. 228-532-0)
4th on the list, which puts it at an estimated 2–10% of the formula.
D-Mannitol
5th on the list, which puts it at an estimated 2–10% of the formula.
Ammonium glycyrrhizate
6th on the list, which puts it at an estimated 2–10% of the formula.
alpha-D-Glucopyranoside, alpha-D-glucopyranosyl
7th on the list, which puts it at an estimated 1–5% of the formula.
Ethanol
8th on the list, which puts it at an estimated 1–5% of the formula.
4-Pyrimidinecarboxylic Acid, 1,4,5,6,-Tetrahydro-2-Methyl-, (4S)-
9th on the list, which puts it at an estimated 1–5% of the formula.
Butanamide, 2,4-dihydroxy-N-(3-hydroxypropyl)-3,3-dimethyl-, (2R)-; dl-Panthenol
10th on the list, which puts it at an estimated 1–5% of the formula.
Castor oil (Ricinus communis), hydrogenated, ethoxylated (60 mol EO average molar ratio)
11th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
2-Phenoxyethanol
12th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
1H-Purine-2,6-dione, 3,7-dihydro-1,3,7-trimethyl-
13th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
2-Propenoic acid, polymer with 2,2-bis(hydroxymethyl)propane-1,3-diol 2-propenyl ether
14th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
bis(D-Gluconato-O1,O2)zinc
15th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Ascorbic acid, monoester with phosphoric acid, magnesium salt (2:3)
16th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Butyrospermum Parkii Butter is the fat obtained from the fruit of the Shea Tree, Butyrospernum parkii, Sapotaceae
17th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Potassium hydroxide
18th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Aesculus Hippocastanum Seed Extract is an extract of the nut of the Horse Chestnut, Aesculus hippocastanum L., Hippocastanaceae
19th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Citrus Paradisi Fruit Extract is an extract of the fruit of the Grapefruit, Citrus paradisi, Rutaceae
20th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
1,2-Propanediol, 3-(2-ethylhexyloxy)
21st on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Urea, (2,5-dioxo-4-imidazolidinyl)-
22nd on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Disodium dihydrogen ethylenediaminetetraacetate
23rd on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Lecithins, hydrogenated
24th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Prunus Armeniaca Kernel Oil is the fixed oil expressed from the kernels of the Apricot, Prunus armeniaca L., Rosaceae
25th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
2-Phenylethanol
26th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Centella Asiatica Leaf Extract is an extract of the leaves of the Hydrocotyl, Centella asiatica L., Apiaceae
27th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Acetylcysteine
28th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Glycyrrhiza Glabra Root Extract is an extract of the roots of the Licorice, Glycyrrhiza glabra L., Leguminosae
29th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Protein hydrolyzates, silk
30th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Maltodextrin
31st on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Pentapeptide-59 is the synthetic peptide consisting of arginine, histidine, phenylalanine and valine.
32nd on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Benzyl alcohol
33rd on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Potassium (E,E)-hexa-2,4-dienoate
34th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Sodium benzoate
35th on the list, below the 1% line — present at under 1%, which for most ingredients is the level they work at.
Osmanthus Fragrans Leaf Extract is the extract of the leaves of Osmanthus fragrans, Oleaceae.
Products in the same category that share this formula's distinguishing ingredients.
111Skin
Shares 7 key ingredients with Y Theorem Bio Cellulose Facial Mask Box: Water, Glycerin, Peg-60 Hydrogenated Castor Oil, Panthenol, Trehalose
LA MER
Shares 6 key ingredients with Y Theorem Bio Cellulose Facial Mask Box: Water, Glycerin, Zinc Gluconate, Butylene Glycol, Caffeine
Kundal
Shares 5 key ingredients with Y Theorem Bio Cellulose Facial Mask Box: Glycerin, Trehalose, Butylene Glycol, Panthenol, Alcohol
Kundal
Shares 5 key ingredients with Y Theorem Bio Cellulose Facial Mask Box: Glycerin, Trehalose, Butylene Glycol, Panthenol, Alcohol
Kundal
Shares 5 key ingredients with Y Theorem Bio Cellulose Facial Mask Box: Glycerin, Trehalose, Butylene Glycol, Panthenol, Alcohol
Kundal
Shares 5 key ingredients with Y Theorem Bio Cellulose Facial Mask Box: Glycerin, Trehalose, Butylene Glycol, Panthenol, Alcohol
WATER, GLYCERIN, BUTYLENE GLYCOL, MANNITOL, AMMONIUM GLYCYRRHIZATE, TREHALOSE, ALCOHOL, ECTOIN, PANTHENOL, PEG-60 HYDROGENATED CASTOR OIL, PHENOXYETHANOL, CAFFEINE, CARBOMER, ZINC GLUCONATE, MAGNESIUM ASCORBYL PHOSPHATE, BUTYROSPERMUM PARKII BUTTER, POTASSIUM HYDROXIDE, AESCULUS HIPPOCASTANUM SEED EXTRACT, CITRUS PARADISI FRUIT EXTRACT, ETHYLHEXYLGLYCERIN, ALLANTOIN, DISODIUM EDTA, HYDROGENATED LECITHIN, PRUNUS ARMENIACA KERNEL OIL, PHENETHYL ALCOHOL, CENTELLA ASIATICA LEAF EXTRACT, ACETYL CYSTEINE, GLYCYRRHIZA GLABRA ROOT EXTRACT, SILK AMINO ACIDS, MALTODEXTRIN, PENTAPEPTIDE-59, BENZYL ALCOHOL, POTASSIUM SORBATE, SODIUM BENZOATE, OSMANTHUS FRAGRANS LEAF EXTRACT.
PANTHENOL, MAGNESIUM ASCORBYL PHOSPHATE, PENTAPEPTIDE-59.
Apply the middle Bio-Cellulose layer to clean, dry skin. Wear for 20 minutes. N.B. Use up to three times per week, and for longer durations when extra hydration is needed.
Judged on how rich the formula reads from its ingredient list, it suits Balanced, Combination (oily), Oily skin best. It is the least natural fit for Dry, Combination (dry) skin.
No ingredient in this formula carries a common-irritant flag, making it a reasonable option for reactive skin. A patch test is still recommended, as individual skin reactivity varies.
2 ingredients could feed malassezia: Butyrospermum Parkii Butter, Prunus Armeniaca Kernel Oil. That describes the yeast's food supply, not a prediction that they will cause a breakout.
Nothing in this formula is on the standard pregnancy-caution list. That is not medical clearance — check anything you use daily with your doctor or midwife.
No — it contains Benzyl Alcohol.
Yes — it contains Alcohol.
Yes. Reading the full ingredient list, this formula is silicone-free.
No. Reading the full ingredient list, this formula is essential-oil-free.
Yes. Reading the full ingredient list, this formula is paraben-free.
It layers well with Vitamin C (L-ascorbic acid), Retinoids (retinol, retinal), AHAs (glycolic, lactic), BHA (salicylic acid), PHAs (gluconolactone), Benzoyl peroxide.
Use it morning and evening, after serums.
It lists 35 ingredients, of which 3 are recorded as actives.
111Skin.
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