CAY SKIN Mo'Bay Mineral Sunscreen SPF 30
Works for
1 of 3 advertised claims delivered
Sun protectionSPF 30 · 1 UV filter · Broad spectrumWeak protectionLow zinc dose
This product uses a single UV filter (zinc oxide) in a relatively low concentration and might not be able to provide a reliable sun protection.
This product can be considered "reef safe" because it does not contain the UV filters (oxybenzone and octinoxate) that can be harmful to coral reefs when present in the water in high concentrations.
Moisturizing12 ingredients credited for this claimStrong support
“Formulated to blend seamlessly and enriched with antioxidants and skin-nourishing ingredients Sea Moss Inspired by Winnie’s Jamaican heritage, this nutrient-rich seaweed strengthens and protects the skin’s moisture barrier.”
This product can help improve hydration of the skin with the two types of ingredients.
The first type is called “humectants”:
these ingredients help attract water.
When humectants are on the surface of the skin, they “pull in” the moisture from the outside environment, or from
within deeper layers of the skin. The following ingredients in this product do the job:
glycerin, lactobacillus ferment.
This product also contains ingredients called “occlusives”. They help reduce the speed with which our skin loses moisture to the outside environment. These ingredients also help soften the upper layer of the skin, so it feels less tight and nicer to the touch. The following ingredients in this product do the job: chondrus crispus extract, dimethicone.
The following ingredients in this product are especially good for supporting the skin barrier and helping with the hydration level: urea
Anti-aging3 ingredients credited for this claimLimited support
This product does not contain ingredients that are able to reduce fine lines and wrinkles or help with skin elasticity, but it can improve the look of the skin temporarily through moisturization. Well-moisturized skin might also be able to repair the sun damage better.
The biggest anti-aging effect in this product comes from sun protection. Sun damage is the main factor causing early signs of skin aging. We, however, do not recommend using this product as a sunscreen because the protection it offers is not strong enough).
Can it cause trouble?
Irritancy13 flagged ingredientsLow risk
Comedogenic1 ingredient rated 2 or more on the 0–5 pore-clogging scale1 flagged
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Ingredients
Filter by role to see what each ingredient is doing.
Zinc oxide9.4%
- Irritation risk
- Low
A broad spectrum sunblock (protects from both UVA and UVB rays). Is suitable for most sensitive skins. In small concentrations, can be used as a colorant
More about Zinc oxideWater~45–55%
C12-15 alkyl benzoate~6.6–8%
- Irritation risk
- Low
Enhances the product texture and makes it more spreadable. Helps reduce water loss from the outer layer of skin. Extands the shelf life by preventing bacteria growth
More about C12-15 alkyl benzoateSorbitan oleate decylglucoside crosspolymer~4.5–5.5%
- Irritation risk
- Medium
Helps oil and water mix together. Used as a cleansing agent
More about Sorbitan oleate decylglucoside crosspolymerArgania spinosa kernel oil~2.8–3.5%
- Irritation risk
- Medium
An emollient that helps soften the upper layer of the skin. Might have some weak anti-oxidant properties
More about Argania spinosa kernel oilTocopheryl acetate~2–2.4%
- Irritation risk
- Medium
A more stable but less bio-available form of vitamin E compared to Tocopherol. Might help moisturize and protect the skin from free radicals, but mostly used in low concentrations to stabilize other ingredients.
More about Tocopheryl acetateAmmonium acryloyldimethyltaurate/vp copolymer~1.7–2.1%
- Irritation risk
- Low
Increases thickness of a product. Texture enhancer for oil-in-water emulsions
More about Ammonium acryloyldimethyltaurate/vp copolymerGlycerin~1.6–2%
- Irritation risk
- Low
One of the best moisturizing ingredients. Naturally present in skin. It attracts water to the upper layer of the skin working as a humectant
More about GlycerinPolyester-5~1.5–1.8%
- Irritation risk
- Low
Aloe barbadensis leaf juice~1.2–1.5%
- Irritation risk
- Medium
Traditionally used to treat sunburns, dermatitis and inflammation, but evidence for its effectiveness is lacking. The extract can contain humectants that help attract water into the skin
More about Aloe barbadensis leaf juicePsidium guajava leaf extract~0.95–1.15%
- Irritation risk
- Low
Ethyl ferulate~0.65–1%
- Irritation risk
- Low
Squalane~0.6–0.9%
- Irritation risk
- Low
An oil naturally present in skin. Works as an emollient to soften the skin and form a protective layer on its surface without a greasy feeling.
More about SqualaneButyrospermum parkii nut extract~0.55–0.8%
- Irritation risk
- Low
Bisabolol~0.4–0.6%
- Irritation risk
- Low
An active component of chamomile plant that historically has been used to calm down irritated skin. A recent study shows that bisabolol indeed can have some anti-inflammatory effect on skin, even though conclusive data is lacking. Bisabolol has a sweet floral scent and can be added to products for its aromatic properties
More about BisabololPhospholipids~0.4–0.6%
- Irritation risk
- Low
Emollients that are naturaly present in skin. In addition, they help water and oil mix together in the product
More about PhospholipidsTocopherol~0.4–0.65%
- Irritation risk
- Low
Pure form of vitamin E. Can help moisturise and protect the skin from free radicals. Often used to help stabilise other ingredients or the formula itself
More about TocopherolUrea~0.35–0.65%
- Irritation risk
- Low
Naturally present in skin (urea makes up about 7% of natural moisturizing factors in skin). Attracts water to the upper layer of the skin. Also has a positive effect on the skin barrier beyond the humectant action. Can enhance penetration of other ingredients. Is an exfoliating ingredient when used in high concentrations
More about UreaChondrus crispus extract~0.3–0.6%
- Irritation risk
- Low
- Comedogenicity
- 3/5
Red algae extract that helps attract water to the upper layer of the skin and create a nicer product consistency
More about Chondrus crispus extractDimethicone~0.3–0.6%
- Irritation risk
- Low
A silicone that helps to reduce water loss from the surface of the skin. Can temporarily "fill in" lines and wrinkles, absorb oil, and create a nice product finish
More about DimethiconeEthylhexylglycerin~0.25–0.45%
Lactobacillus ferment~0.25–0.4%
- Irritation risk
- Low
A fermentation product created by bacteria Lactobacillus. The fermented product has anti-bacterial properties and might be helpful in calming down inflammation, but studies are lacking. Helps attract water to the upper layer of the skin. Can be used as a preservative
More about Lactobacillus fermentGluconolactone~0.2–0.4%
- Irritation risk
- Medium
A polyhydroxy acid (PHA) that helps shed the dead cells from the skin surface revealing smoother skin. Is believed to be genter than AHAs. It helps attract water to the upper layer of the skin and can stimulate production of skin's own hyaluronic acid resulting in improved hydration levels. It has been shown to be helpful against acne and clogged pores if used consistently (e.g over a period of 12 weeks) in high enough concentration. It can help reduce fine lines and wrinkles and improve skin tone with long-term application. Can help neutralize free radicals
More about GluconolactonePropanediol~0.2–0.35%
- Irritation risk
- Low
Acts as a solvent for other ingredients. Speeds up the absorption of other ingredients into the skin
More about Propanediol1,2-hexanediol~0.15–0.3%
Triethoxycaprylylsilane~0.15–0.3%
- Irritation risk
- Low
A type of silicone that helps oil and water mix well together. Helps to disperse other ingredients, e.g. pigments, evenly in a formulation
More about TriethoxycaprylylsilaneHydroxyacetophenone~0.15–0.3%
Phenoxyethanol~0.15–0.3%
- Irritation risk
- Low
A preservative. It helps prevent bacterial growth in cosmetic products
More about PhenoxyethanolSodium chloride~0.2–0.35%
- Irritation risk
- Low
Used to stabilize mixtures of oil and water, and create thicker, gel-like product textures
More about Sodium chlorideBenzyl alcohol~0.05–0.15%
- Irritation risk
- High
A preservative. Can be used to mask unpleasant smell. Can be irritating
More about Benzyl alcoholSodium benzoate~0.05–0.1%
Chlorphenesin~0.05%
Sorbic acid~0.05–0.1%
Potassium sorbate~0.05–0.1%
Citric acid~0.05%
- Irritation risk
- Medium
Can work as an exfoliant but is typically used to adjust the product pH
More about Citric acidIngredient list view
Zinc oxide, Water, C12-15 alkyl benzoate, Sorbitan oleate decylglucoside crosspolymer, Argania spinosa kernel oil, Tocopheryl acetate, Ammonium acryloyldimethyltaurate/vp copolymer, Glycerin, Polyester-5, Aloe barbadensis leaf juice, Psidium guajava leaf extract, Ethyl ferulate, Squalane, Butyrospermum parkii nut extract, Bisabolol, Phospholipids, Tocopherol, Urea, Chondrus crispus extract, Dimethicone, Ethylhexylglycerin, Lactobacillus ferment, Gluconolactone, Propanediol, 1,2-hexanediol, Triethoxycaprylylsilane, Hydroxyacetophenone, Phenoxyethanol, Sodium chloride, Benzyl alcohol, Sodium benzoate, Chlorphenesin, Sorbic acid, Potassium sorbate, Citric acid
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Product summary
"CAY SKIN - Mo'Bay Mineral Sunscreen SPF 30" uses a single UV filter (zinc oxide) in a relatively low concentration and might not be able to provide reliable sun protection.
Its formula is also hydrating, so you might not need an additional moistruizer during the day.
Sunscreen filters
This product is a mineral sunscreen. It uses zinc oxide for sun protection. Zinc oxide almost never irritates the skin or stings eyes, but it can leave a white cast.
Irritation risk
There are some common irritants in this product, including ingredients that do not have benefits for the skin. We assess the overall irritancy of this product to be low. For a detailed overview of all potential irritants: click here
You can see the detailed formula review with the breakdown of all actives in the product and the full ingredient list with estimated concentrations in the tables below.
Sources cited in this review
Every concentration estimate and effectiveness label is anchored to one of these 28 studies and safety reviews.
- 1A review of inorganic UV filters zinc oxide and titanium dioxideonlinelibrary.wiley.com
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