Hydra-Cool Serum
Hydra-Cool Serum
Product Description
Product overview
A lightweight, refreshing hydrating serum that combines Centella Asiatica, 25% Hyaluronic Acid, and Vitamin B5 to intensely hydrate, soothe irritation, and calm redness while delivering a cooling, refreshing sensation to all skin types.
Intensive Hydration
25% Sodium Hyaluronate holds up to 1000x its weight in water for deep, lasting hydration.
Texture & feel
SENSORYIntensive Hydration
25% Sodium Hyaluronate holds up to 1000x its weight in water for deep, lasting hydration.
Cooling Sensation
Menthol delivers an immediate cooling effect that soothes irritated or sunburned skin.
Centella Asiatica Complex
Asiaticoside, Asiatic Acid, and Madecassic Acid calm inflammation and support skin healing.
Post-Procedure Care
Gentle enough for use after chemical peels, laser treatments, and microneedling.
Safety & compatibility
SAFENon-systemic formula with no retinoids, salicylic acid, hydroquinone, or chemical sunscreens. Safe for use during pregnancy and nursing.
Free from oils, fatty acids, esters, polysorbates, and fermented ingredients that feed Malassezia yeast.
Rating 0/5. Oil-free, lightweight formula will not clog pores or cause breakouts.
Fragrance-free and hypoallergenic. Contains soothing Centella and Vitamin B5. Patch test recommended for very reactive skin due to menthol content.
Ingredient breakdown
INGREDIENTSSodium Hyaluronate 25%Proven
The purest salt form of Hyaluronic Acid, a powerful humectant that holds up to 1000x its weight in water. Provides intense, lasting hydration while plumping fine lines and improving skin texture.
- Function: Attracts and binds moisture to the skin surface
- Research: Clinically proven to reduce wrinkle depth and improve skin elasticity
- Benefit: Immediate plumping effect with long-term hydration benefits
Pantothenic Acid (Vitamin B5) 5.5%Proven
Essential nutrient for cellular metabolism that promotes healthy-looking skin. Supports the skin barrier, helps retain moisture, and accelerates wound healing.
- Function: Moisturizes and supports tissue repair
- Research: Studies show improved skin barrier function and reduced transepidermal water loss
- Benefit: Enhances skin's natural healing process post-procedure
Centella Asiatica Complex ActiveProven
Triple-action botanical complex containing Asiaticoside, Asiatic Acid, and Madecassic Acid. Powerful antioxidant with anti-inflammatory and healing properties.
- Asiaticoside: Stimulates collagen synthesis and promotes wound healing
- Asiatic Acid: Strengthens skin barrier and reduces inflammation
- Madecassic Acid: Calms irritation and supports tissue regeneration
Polyporus Umbellatus Extract 0.1%Promising
Mushroom extract with natural antimicrobial properties. Source of Kojic Acid, which helps brighten the complexion and even out skin tone.
- Function: Antibacterial, antimicrobial, and brightening
- Benefit: Assists in minimizing the appearance of uneven skin tone and supports clearer skin
Menthol TraceSoothing
Natural cooling agent derived from mint that provides an immediate refreshing sensation. Helps calm irritated skin and reduces discomfort.
- Function: Creates cooling sensation and temporary relief
- Benefit: Ideal for soothing sunburn, post-shave irritation, and inflamed skin
11 ingredients
Water/Aqua/Eau, Sodium Hyaluronate, Pantothenic Acid, Pentylene Glycol, Menthol, Phenoxyethanol, Asiaticoside, Polyporus Umbellatus (Mushroom) Extract, Asiatic Acid, Madecassic Acid, Blue 1 (CI 42090).
Where it fits in your routine
ROUTINEApply after treatments (retinol, vitamin C) and before heavier moisturizers. Can be used AM & PM.
How to use
HOW TO USEDispense
Apply a small amount (2-3 drops) to the palm of your hand. A little goes a long way.
Apply
Using fingertips, dab and smooth evenly over cleansed face and neck. Pat gently to encourage absorption.
Layer
Follow with your moisturizer or use alone for lightweight hydration. In AM, always finish with SPF.
Pro Tip
Mix 1-2 drops with your foundation before applying for a dewy, glowing finish.
Who is it for?
WHOPerfect for you if:
- You have dehydrated or dry skin needing intense moisture
- Your skin is sensitive, redness-prone, or has rosacea
- You've had chemical peels, laser treatments, or microneedling
- You experience sunburn or post-shave irritation
- You want a lightweight, non-greasy hydrator
- You're pregnant or breastfeeding and need safe hydration
- You struggle with fungal acne and need a safe serum
- You want to layer under makeup for a dewy glow
Consider alternatives if:
- You need a budget-friendly option (this is premium-priced)
- You dislike any cooling/tingling sensation from menthol
- You prefer thicker, richer textures for very dry climates
- You want anti-aging actives like retinol or peptides in one product
- You're looking for exfoliating or brightening treatments
Skin type compatibility
SKIN TYPESOil-free, lightweight formula absorbs instantly without adding shine or greasiness. Perfect for oily skin types.
Provides excellent hydration but may need a richer moisturizer on top in dry climates or during winter months.
Balances well across different face zones. Hydrates dry areas without overwhelming oily T-zone.
Fragrance-free with soothing Centella. Menthol may cause mild tingling—patch test recommended for very reactive skin.
Non-comedogenic (0/5), oil-free, fungal acne safe. Calms redness and inflammation from active breakouts.
High-concentration HA plumps fine lines. Best when paired with anti-aging actives in a complete routine.
Results timeline
6-8 WEEKSCooling Relief & Instant Hydration
Skin feels refreshed with a cooling sensation. Immediate plumping and hydration visible upon application.
95% noticedImproved Skin Texture
Skin feels smoother and more supple. Redness and irritation visibly reduced. Less flaking and dryness.
87% noticedVisible Plumping & Glow
Fine lines appear diminished. Skin has a healthy, dewy glow. Complexion looks more even and radiant.
78% noticedLong-Term Skin Health
Improved skin barrier function. Better moisture retention throughout the day. Calmer, more resilient skin overall.
72% noticedRatings by platform
1K+ REVIEWSPros & cons
BALANCEDPraised
- Lightweight, non-greasy formula absorbs instantly
- Cooling sensation soothes irritated and sunburned skin
- Excellent for post-procedure care (peels, laser, microneedling)
- Works well under makeup for a dewy glow
- Fragrance-free and suitable for sensitive skin
- Pregnancy and fungal acne safe formula
- High concentration of Hyaluronic Acid (25%)
- A little goes a long way—one bottle lasts 2-3 months
Criticized
- Premium price point ($103 for 30ml)
- Menthol may irritate very sensitive or reactive skin
- May not provide enough moisture for extremely dry climates alone
- Blue tint can be concerning (doesn't transfer to skin)
- Small bottle size for the price
- No anti-aging actives beyond hydration
Budget-friendly alternatives (dupes)
DUPESSame core ingredients (HA + B5) at a fraction of the price. Multiple molecular weights for multi-depth hydration. Lacks Centella complex and cooling sensation. Slightly stickier texture.
Contains Centella Asiatica and Panthenol like the original. Larger size (40ml). K-beauty brand with excellent value. Lighter texture, no menthol cooling effect.
French pharmacy brand with HA + B5 + Madecassoside. Contains silicones and fragrance. More accessible at drugstores. Good mid-range alternative.
Affordable drugstore option with HA. Adds niacinamide for additional benefits. Different ingredient profile but similar hydration goal. Widely available.
Comparison with competitors
SIDE-BY-SIDEStorage & shelf life
12 MONTHS12 months after opening
Store in a cool, dry place away from direct sunlight. Refrigeration optional for enhanced cooling effect.
Glass bottle with dropper dispenser for hygienic, precise application
Yes, under 100ml/3.4oz TSA limit. Glass bottle—pack carefully in checked luggage.
Frequently asked questions
FAQYes, Hydra-Cool Serum is considered safe for use during pregnancy and breastfeeding. The formula is non-systemic and contains no retinoids, salicylic acid, hydroquinone, or chemical sunscreen filters. The ingredients—Hyaluronic Acid, Vitamin B5, Centella Asiatica, and Mushroom Extract—are all pregnancy-safe. However, always consult with your healthcare provider before introducing new skincare products during pregnancy.
Yes, Hydra-Cool Serum is fungal acne safe. The formula is free from oils, fatty acids, esters, polysorbates, and fermented ingredients that can feed Malassezia yeast. The clean, minimal ingredient list (only 11 ingredients) makes it an excellent choice for those prone to fungal acne or pityrosporum folliculitis.
Yes, Hydra-Cool Serum pairs well with most active ingredients. Apply it after your treatment serums (retinol, vitamin C, AHA/BHA) to provide soothing hydration and help buffer any irritation. The Centella Asiatica and Vitamin B5 can actually help calm skin that's adjusting to stronger actives. Wait for each product to absorb before layering.
Hydra-Cool Serum works for all skin types but excels for oily, combination, sensitive, and acne-prone skin due to its lightweight, oil-free formula. It's particularly beneficial for those with rosacea or redness-prone skin. Dry skin types can use it but may need to layer a richer moisturizer on top, especially in harsh climates.
You'll feel immediate hydration and cooling relief upon first application. Within 1-2 weeks, expect improved skin texture and reduced irritation. Visible plumping of fine lines and enhanced skin glow typically appear at 3-4 weeks of consistent use. Long-term benefits like improved barrier function develop over 6-8 weeks.
Apply Hydra-Cool Serum after cleansing, toning, and any treatment serums (retinol, vitamin C), but before heavier moisturizers and sunscreen. As a water-based serum, it should go on before oil-based products. Can be used both morning and evening. In AM, always follow with SPF.
No, Hydra-Cool Serum has a comedogenic rating of 0/5. It's completely oil-free, non-comedogenic, and won't clog pores. The lightweight formula is actually beneficial for acne-prone skin as it provides hydration without contributing to breakouts. Many users with oily and acne-prone skin report improved skin clarity.
Hydra-Cool Serum has a PAO (Period After Opening) of 12 months. Store in a cool, dry place away from direct sunlight for optimal preservation. With typical twice-daily use, a 30ml bottle lasts approximately 2-3 months. The blue color may fade slightly over time but this doesn't affect efficacy.
Verdict: iS Clinical Hydra-Cool Serum is a premium, professional-grade hydrating serum that delivers on its promises. The 25% Hyaluronic Acid concentration combined with Centella Asiatica makes it exceptionally effective for soothing irritation, calming redness, and providing intense hydration. It's particularly outstanding for post-procedure care, sensitive skin, and those who need a pregnancy-safe or fungal-acne-safe option. The cooling sensation is refreshing, though sensitive users should patch test first. The main drawback is the premium price—at $103 for 30ml, it's a significant investment. However, for those who can afford it and prioritize clinical-grade ingredients, this serum is a standout choice that earns its cult-favorite status among dermatologists and aestheticians.
Product Overview
Quick product notes are a great way to check if a product is free from commonly avoided ingredients by skincare enthusiasts. These preferences come about for different reasons depending on the ingredient such as personal experiences, sensitivities, health preferences & etc.
Just because a product is not free from a common preference does not mean it's a bad product! You can make a personal decision whether or not you want to use a product that contains these ingredients or not - click the labels of the preference to read more about them.
Quick Product Notes
Ever used a product that promised a certain effect but provided no results? It might not have contained any notable ingredients that could have been responsible for that promised effect. It doesn't matter what the marketing or packaging «promises» it can do, if it doesn't contain anything that can help - then the likelihood of it helping is low.
We help you identify key notable ingredients that have been shown to help with effects such as acne-fighting, brightening, UV-protection, wound healing & anti-aging to help you achieve your skincare goals smarter. Please note that different notable ingredients have varying levels of research behind them, some are extremely well proven yet some have mixed research in their efficacy.
Just because a product doesn't contain any notable ingredients doesn't mean it's bad. And a product with notable ingredients (or even many) doesn't necessarily guarantee the efficacy of the product performing these effects either. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine this.
Be smart and use this as just a starting point for you to make more informed and smarter choices and compare it with reviews to see if the product is right for you
Notable Effects & Ingredients
Why are some products great for some people and horrible for others? Well everyone has different skin types and different reactions to the same ingredients.
We've identified a range of ingredients that are commonly regarded as potentially good or bad for those with Dry, Oily/Acne-Prone or Sensitive skin.
A product that contains good or bad ingredients for your skin type doesn't always flat out make the entire product good or bad for your skin. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine your skins reaction.
One of the best ways to use this section is to troubleshoot products you've had bad experiences with in the past. Check if it contains any of the marked ingredients to point out suspect ingredients to avoid in the future!
Ingredients Related to Skin Types
Ingredient Safety Breakdown refers to the percentage % of ingredients in different risk categories as classified by EWG (Environment Working Group) if they are available. There are almost endless cosmetic ingredients and they are one of the few organisations globally that have assigned ratings to a lot of the more commonly used ingredients which is why we reference them.
EWG is seen by many to be more on the alarmist side in their assignment of health ratings resulting in rating ingredients as riskier than they actually are. We recommend using this a reference point rather than a strict guide of ingredient safety and to always do further research if into ingredients that you may find suspect.
Ingredient Safety Breakdown
Product ingredient list
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
| 1 |
Water
Solvent, Skin Conditioning
|
|
|
| 1 |
Sodium Hyaluronate
Skin Conditioning, Humectant
|
Promotes Wound Healing
Hydrating
|
|
| 0 |
Pantothenic Acid
Skin Conditioning, Antistatic Agent, Hair Conditioning
|
|
|
| 1 |
Pentylene Glycol
Solvent, Skin Conditioning
|
|
|
| 1 |
Menthol
Masking, Fragrance, Flavoring Agent, Soothing, Refreshing, Denaturant, External Analgesic
|
|









