Step 04 · Treat

ECW Ampoule

Name: ECW Ampoule
Brand: Youlief

1.69 fl. oz. / 50 mL

Hydration with a lifted look.

Multi-weight hyaluronic acid layers water into skin at different depths, while an Antarctic marine ferment, niacinamide and caffeine leave the look of firmer, fresher, more awake skin.

Multi-weight HAMarine fermentFirming look

✓Dermatologist Tested

✓Sensitive-Skin Tested

✓Made in Korea

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How to use

After toner, press 2–3 drops into skin morning and evening, then seal with cream. Layers well under makeup.

Key ingredients

Multi-Weight Hyaluronic Acid · Pseudoalteromonas Ferment · Niacinamide · Caffeine

Full ingredient list (INCI)

Water, Butylene Glycol, Glycerin, 1,2-Hexanediol, Niacinamide, Diglycerin, Propanediol, Methylpropanediol, Hydroxyethyl Cellulose, Carbomer, Tromethamine, Ethylhexylglycerin, Adenosine, Disodium EDTA, Pseudoalteromonas Ferment Extract, Sodium Hyaluronate, Beta-Glucan, Caprylyl Glycol, Hydrolyzed Hyaluronic Acid, Sodium Acetylated Hyaluronate, Caffeine, Tocopherol

Ingredient Talk

Why multi-weight matters

One size of hyaluronic acid sits on top; several sizes settle in at different depths. That layered hydration is what gives skin the plump, lifted look a single humectant can’t manage on its own.

Product features

Layered Hyaluronics

Multiple molecular weights of hyaluronic acid hydrate at the surface and beyond.

Antarctic Marine Ferment

Pseudoalteromonas ferment extract leaves skin looking smooth and resilient.

Niacinamide + Caffeine

A brightening, de-puffed, awake look — morning skin’s best friend.

Water-Gel Glide

A cushiony gel that sinks in fast and layers cleanly under cream.