SKIN1004 Hyalu-Cica Water-Fit Sun Serum SPF50+ PA++++
One of the lightest daily sunscreens on the market: a watery, serum-textured organic-filter formula that sinks in almost instantly and leaves nothing sitting on the skin. Hyaluronic acid and centella give it a skincare framing, but the achievement here is the base — it feels like an essence, which is exactly why people who hate sunscreen buy it again. Rated SPF50+ PA++++ on the Korean scale.
What it is built around
Who it suits
Oily and combination skin, humid climates, and anyone who has abandoned sunscreen over texture alone. It sits well under makeup and reapplies over it more graciously than a cream does. Dry skin will need a moisturiser underneath, since there is very little emollience here. Sensitive skin generally tolerates it, though the fluid texture can travel into the eyes.
How to use it
Final morning step. Because it is so light, measure it — two fingers' length, or roughly a quarter teaspoon for the face — rather than going by feel, which is where thin sunscreens quietly lose most of their protection. Let it set for a quarter of an hour. Reapply outdoors every couple of hours.
🏆 Compare Korean sunscreen for sun damage & photoageing →
We describe products from public information and rank ingredients, never take payment for placement. Formulas change — always read the current ingredient list on the pack you buy.
Related K-beauty guides
Try the free tools
🙋 People also ask
What is the difference between essence and serum?
In Korean skincare, essence is typically a thinner, hydration-focused layer that preps skin, while serum is more concentrated with targeted actives like vitamin C or niacinamide. Essence usually comes first; serum follows. The line between them blurs, and not every routine needs both.
What is the difference between essence, serum and ampoule?
Essence is the lightest and most hydration-focused, serum is more concentrated and targeted, and ampoule is the most concentrated of the three. The boundaries are marketing convention, not regulated definitions.
✍️ Written & reviewed by the KoreaPlus Editorial team — dermatologist-informed, cosmetic-science researched & source-cited. Last reviewed: 2026-08-23.
General educational information using cosmetic structure-function wording — not medical advice. Always patch-test new actives. © KoreaPlus.