ROUND LAB
Birch Moisturizing Sun Stick SPF 50A sunscreen built around Chemical sunscreen, for barrier repair and smoothing.
A sunscreen built around Vitamin E and Niacinamide, for hydration and barrier repair.
Brand price
USD 25.00 · checked 25 Sept 2026 · brand's site
Brand price
USD 24.99 · checked 25 Sept 2026 · brand's site

At a Glance

They come out differently on Oil-free and Reef-safe; those rows are shaded. Tap any answer to see why.

Key Ingredients

Chemical sunscreen4
Organic UV filters that absorb UV and release it as heat.
Butyl Methoxydibenzoylmethane, Ethylhexyl Salicylate, Homosalate, Octocrylene
Sunscreen4
Any ingredient acting as a UV filter.
Butyl Methoxydibenzoylmethane, Ethylhexyl Salicylate, Homosalate, Octocrylene
Hyaluronic acid2
Hyaluronic acid and its salts; a humectant that binds water to the skin.
Chemical sunscreen3
Organic UV filters that absorb UV and release it as heat.
Butyl Methoxydibenzoylmethane, Ethylhexyl Salicylate, Homosalate
Fatty alcohol1
Waxy fatty alcohols used as emollients and thickeners; unrelated to drying alcohol.
Sunscreen3
Any ingredient acting as a UV filter.
Butyl Methoxydibenzoylmethane, Ethylhexyl Salicylate, Homosalate

Benefits

Hydrating8
Boosts hydration and relieves dry, tight skin.
Aloe Barbadensis Leaf Extract, Butylene Glycol, Dimethicone, Dipotassium Glycyrrhizate, Glycerin, Glyceryl Glucoside, Hyaluronic Acid, Sodium Hyaluronate
Barrier Repair16
Strengthens and restores the skin's natural barrier.
Allantoin, Aloe Barbadensis Leaf Extract, Bis-Behenyl/Isostearyl/Phytosteryl Dimer Dilinoleyl Dimer Dilinoleate, Camellia Japonica Seed Oil, Copernicia Cerifera Wax, Diethylhexyl Carbonate, Diisostearyl Malate, Dimethicone, Ethylhexyl Isononanoate, Glycerin, Glyceryl Caprylate, Isopropyl Palmitate, Laminaria Japonica Extract, Phenethyl Benzoate, Silica Dimethyl Silylate, Synthetic Wax
Reduces Irritation2
Eases discomfort and supports skin resilience.
Hydrating8
Boosts hydration and relieves dry, tight skin.
Butylene Glycol, Glycerin, Glyceryl Glucoside, Hyaluronic Acid, Propanediol, Sodium Hyaluronate, Sparassis Crispa Extract, Tocopherol
Barrier Repair7
Strengthens and restores the skin's natural barrier.
Allantoin, Cetearyl Alcohol, Diethylhexyl 2,6-Naphthalate, Glycerin, Glyceryl Stearate Citrate, Niacinamide, Tocopherol

Concerns

May Worsen Seborrheic Dermatitis7
May feed the yeast involved in seborrheic dermatitis.
Bis-Behenyl/Isostearyl/Phytosteryl Dimer Dilinoleyl Dimer Dilinoleate, Butyloctyl Salicylate, Camellia Japonica Seed Oil, Candelilla Wax Esters, Copernicia Cerifera Wax, Diisostearyl Malate, Isopropyl Palmitate
May Worsen Keratosis Pilaris1
May clog follicles or strip skin prone to keratosis pilaris.
May Worsen Seborrheic Dermatitis7
May feed the yeast involved in seborrheic dermatitis.
Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Butyloctyl Salicylate, Cetearyl Alcohol, Glyceryl Stearate Citrate, Poly C10-30 Alkyl Acrylate, Polyglyceryl-3 Distearate, Sodium Stearoyl Glutamate
May Worsen Keratosis Pilaris2
May clog follicles or strip skin prone to keratosis pilaris.
May Worsen Irritation3
May cause stinging, redness or sensitivity.
Anthemis Nobilis Flower Oil, Pinus Sylvestris Leaf Oil, Tocopherol

Ingredients Side-by-side

Water (in both products)
Skin Conditioning
Emollient
Methyl Methacrylate Crosspolymer
Film Forming
Water (in both products)
Skin Conditioning
Film Forming
Humectant
Occlusive
0-3 / 3
- Vitamin E
- Anti-Pollution
- Antioxidant
- May Trigger Acne
- May Worsen Irritation
- May Worsen Keratosis Pilaris
Smoothing
0 / —
- Niacinamide
- Acne Fighting
- Barrier Repair
- Brightening
- Dark Spots
- Even Tone
- Oil Control
- Pore Refining
- Redness Reducing
Emulsifying
- Fatty esters (glyceryl stearate, PEG-100 stearate)
- May Worsen Seborrheic Dermatitis
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Water
Antiplaque, Skin Conditioning, Solvent
Aqua (EU),Deionized Water,Distilled Water,Micromatrix Fractile AN,Onsen-Sui (JPN),Purified Water
Learn more about Water →Homosalate
Fragrance, UV Absorber, UV Filter
Homosalate is a chemical UV filter.
Learn more about Homosalate →Ethylhexyl Salicylate
Light Stabilizer, UV Absorber, UV Filter
Ethylhexyl Salicylate is a chemical UV filter.
Learn more about Ethylhexyl Salicylate →Butyl Methoxydibenzoylmethane
Light Stabilizer, UV Absorber, UV Filter
Butyl Methoxydibenzoylmethane is a chemical UV filter.
Learn more about Butyl Methoxydibenzoylmethane →Butyloctyl Salicylate
Hair Conditioning, Skin Conditioning, Solvent
Butyloctyl Salicylate isn't fungal acne safe.
Learn more about Butyloctyl Salicylate →Polymethylsilsesquioxane
Opacifying
Polymethylsilsesquioxane is a silicone.
Learn more about Polymethylsilsesquioxane →Artemisia Annua Extract
Fragrance
Artemisia Annua Extract is an extract of the whole herb, Artemisia annua L., Compositae
Learn more about Artemisia Annua Extract →Pinus Sylvestris Leaf Oil
Fragrance
Pinus Sylvestris Leaf Oil is a fragrant essential oil.
Learn more about Pinus Sylvestris Leaf Oil →Anthemis Nobilis Flower Oil
Fragrance, Perfuming, Skin Conditioning
Anthemis Nobilis Flower Oil is a fragrant essential oil.
Learn more about Anthemis Nobilis Flower Oil →Allantoin
Skin Conditioning, Skin Protecting, Soothing
Urea, (2,5-dioxo-4-imidazolidinyl)-
Learn more about Allantoin →
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