Do you know that sunscreen is essential 365 days a year, but still avoid it because of the following concerns?
- You hate the sticky and greasy feeling.
- You’re worried it might irritate your sensitive skin.
- You’re afraid it might clog your pores and cause breakouts.
- It makes your makeup clumps, flakes, or easily breaks down when you apply sunscreen.
Experience a weightless, hydrating feel with Isntree’s Hyaluronic Acid Fresh Sun Serum! This is not your typical sticky, heavy sunscreen—it’s a water-based essence that offers powerful SPF50+ PA++++ protection with a zero-white-cast, non-greasy finish. Say goodbye to sun-induced skin concerns and hello to fresh, dewy, protected skin!
Introducing our ultra-lightweight, airy-fit transparent sun serum for 365 days of grease-free daily moisture protection

Main Features
- Ultra-Light Serum Texture: Feels like a feather-light essence, not a heavy sunscreen.
- 81% Hydrating Formula: Delivers an instant moisture boost to thirsty skin.
- Instant Cooling Effect: Lowers skin temperature by -4.53°C on the spot.
- Non-Comedogenic: Safe for acne-prone skin, proven not to clog pores.
- Strong UV Protection: Shields skin with powerful SPF50+ PA++++.
- Makeup-Friendly Finish: A non-sticky base for flawless, long-lasting makeup.
- Winner of multiple prestigious awards, including Hwahae’s “Weekly Best” and Director Pi’s “Top of Top.”

More than just sun protection—it’s 81% moisturizing essence!
This sun care formula provides powerful protection while delivering hydration and soothing comfort with low molecular weight hyaluronic acid.
Intense hydration and Soothing comfort!

Main Ingredients
- Ultra-Low Molecular Hyaluronic Acid: Quickly absorbs deep into the skin to provide intense hydration, helping to quench skin’s thirst and improve inner dryness.
- Soothing Ingredients (Squalane, Allantoin, Panthenol): These key ingredients work together to calm and comfort skin that has been exposed to external stressors.
Skin Test
Human application test to evaluate the efficacy of Hyaluronic Fresh Sun Serum in improving skin hydration, inner-skin (2.5mm deep) hydration, and thermal irritation soothing (cooling) immediately after use.
- Test Institute: Maridemp Clinical Research Center Co., Ltd.
- Test Period: December 16, 2024 ~ January 20, 2025
- Test Subjects: 20 adults
- Results:
- No more surface-level moisture! Deeply hydrating from first use
Immediately after use: 97.29% improvement in skin surface hydration
Immediately after use: 4.00% improvement in skin’s deep hydration*
“Applies to the stratum corneum - Cool and soothe your heated skin
-4.53°C reduction in skin surface temperature after single use
- No more surface-level moisture! Deeply hydrating from first use

Evaluation of Hyaluronic Fresh Sun Serum’s suitability for use on acne-prone skin.
- Test Institute: Maridemp Clinical Research Center Co., Ltd.
- Test Period: December 16, 2024 ~ January 17, 2025
- Test Subjects: 20 adults
- Result: Hyaluronic Fresh Sun Serum has completed a non-comedogenic test, confirming that it can be used safely by individuals with acne-prone skin without the concern of clogged pores.
100% Satisfaction Rate (Results from a Fresh Sun Serum user satisfaction survey):
- It absorbs quickly into the skin: 100%
- It feels comfortable and adheres thinly to the skin: 100%
- It feels fresh and non-greasy after application: 100%
Formulation
A translucent, pink-tinted water-based serum that transforms into a watery consistency upon application. It absorbs quickly without any stickiness, leaving a fresh and comfortable finish.
How to use
- In the final step of your skincare routine, dispense an appropriate amount.
- Apply evenly to the face and any areas exposed to sunlight.
- Tip: For optimal sun protection, apply 15 minutes before sun exposure and reapply every 2-3 hours during prolonged outdoor activity.

Recommended for
- Those who dislike heavy or greasy sunscreens.
- Those who want a sunscreen that feels like a hydrating serum.
- Those with oily, combination, or acne-prone skin looking for a non-comedogenic formula.
- Those who need a sunscreen that provides strong UV protection without a white cast.
- Those who want to hydrate and soothe their skin while protecting it from the sun.
- Those whose makeup tends to cake or slide when using sunscreen.
Ingredients
Water, Dibutyl Adipate, Propanediol, Butyloctyl Salicylate, Ethylhexyl Triazone, Niacinamide, Drometrizole Trisiloxane, Polyglyceryl-3 Distearate, Terephthalylidene Dicamphor Sulfonic Acid, Polymethylsilsesquioxane, Diethylamino Hydroxybenzoyl Hexyl Benzoate, Tromethamine, Panthenol, 1,2-Hexanediol, Pentylene Glycol, Glyceryl Stearate, Silica, Caprylyl Methicone, Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, Potassium Cetyl Phosphate, Lactobacillus Ferment, Poly C10-30 Alkyl Acrylate, Methylpropanediol, Carbomer, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Ethylhexylglycerin, Hydrolyzed Sodium Hyaluronate, Xanthan Gum, Adenosine, Polyether-1, Sodium Hyaluronate, Biosaccharide Gum-1, Squalane, Allantoin, Erythritol, Tocopherol, Ectoin, Hydroxypropyltrimonium Hyaluronate, Zinc Hydrolyzed Hyaluronate, Glycerin, Butylene Glycol, Houttuynia Cordata Extract, Citric Acid, Sodium Acetylated Hyaluronate, Hydrolyzed Hyaluronic Acid, Hydrogenated Lecithin, Hyaluronic Acid, Polyglyceryl-10 Stearate, Centella Asiatica Extract, Sodium Hyaluronate Crosspolymer, Sodium Ascorbyl Phosphate, Tocopheryl Acetate, Coconut Water, Potassium Hyaluronate, Retinyl Palmitate, Biotin, Thiamine HCl, Folic Acid, Pyridoxine, Cyanocobalamin *Total content of hyaluronic acid: 517 ppm
Discover Isntree: Honest, Natural, and Effective Korean Skincare
Isntree is a leading Korean skincare brand dedicated to creating honest and effective products. Our name, derived from “ISLAND,” “NATURE,” and “TREE,” reflects our core philosophy: sourcing the highest quality natural ingredients from pure environments to deliver visible results. As a trusted pioneer in clean beauty, we believe in a minimalist approach to skincare. We focus on using essential, skin-loving ingredients to formulate products that are gentle enough for even the most sensitive skin. All of our products are dermatologist-tested to ensure they meet the highest standards of safety and efficacy. Our entire collection is proudly vegan and cruelty-free, embodying our deep commitment to ethical and sustainable practices. We are passionate about protecting not only your skin but also the environment, which is why we also prioritize eco-friendly packaging. Explore our popular product lines featuring hero ingredients like Hyaluronic Acid, Green Tea, and Mugwort to find the perfect solution for your skin concerns. Whether you need deep hydration, soothing, or brightening, Isntree provides reliable K-Beauty solutions that deliver.










sarah_m_92 –
I love how smoothly this goes on, and best of all, there is absolutely no eye stinging. It feels just like a lightweight serum.
chelsea.d –
This is the exact SPF I¡¯ve been searching for. No other sunscreen applies as seamlessly like a regular daily lotion as this one. It completely lacks that typical annoying sunscreen smell, stickiness, and heavy, suffocating feeling.
J. L. Miller –
It glides on beautifully, doesn’t burn my eyes, and just feels incredibly comfortable on the skin.
Jenna Mason –
Being dry-skinned, I¡¯ve tried tons of hydrating sunscreens, but the downside is they usually melt off the moment you sweat. This sun serum glides on like a dream but doesn’t feel sticky, and it actually stays put even when I sweat. Absolute best!
hannah_g88 –
The glide is beautiful, and I love the weightless texture that is typical of a good chemical sunscreen. However, while most reviews said this doesn’t sting eyes at all, I personally experienced a little bit of eye irritation.
Amber M. –
I have oily skin, and I love that this formula keeps excess sebum in check. Honestly, it controls my oils better than the most mattifying sun stick I own. Highly recommend for oily skin types!
amandabaker –
This sun serum doesn’t irritate my eyes or cause any breakouts, and the blendability is amazing. However, it leaves a pretty dewy finish on my skin, so I do need to set it with a translucent powder.
Victoria P. –
I have oily skin, and this sun serum is literally the only sunscreen I will ever use. It¡¯s perfect.
Brooke S. –
This product leaves my face so beautifully hydrated and the texture is amazing. Just a tip: if you don¡¯t let it fully sink into your skin before moving to your makeup routine, it can cause your foundation to pill and look patchy.
Katelyn_R –
I have dry skin, so whenever I use matte SPFs, the product settles terribly into my pores and fine lines, which usually makes me skip sunscreen altogether. But this sun serum goes on so smoothly and keeps my face deeply hydrated.
Rebecca Lynch –
The application is so smooth and it doesn’t irritate my eyes at all. I have dry skin, but even when I layer my makeup over this sun serum, it never looks cakey or flaky.
Allison Moore –
I¡¯ve gone through countless sunscreens from so many different brands, but this sun serum is hands down the absolute best! Zero white cast, flawless application, and leaves my skin feeling incredibly plump and moisturized.
Taylor Brown –
It feels deeply moisturizing while you¡¯re applying it, but it dries down to a fresh, clean finish without any greasy residue. Love it.
michelle_tanner –
I am definitely settling down with this product. No white cast, no eye stinging, and it sits beautifully under my makeup without any issues.