SKIN1004 Hyalu-CICA Water-fit Sun Serum (Sun Serum, 1 Pack)

Daily sun care often gets skipped because the formula feels heavy, leaves a chalky film, or sits on top of makeup instead of settling into it. SKIN1004 built its Hyalu-CICA Water-fit Sun Serum around that friction, giving a chemical UV filter formula the consistency of a lightweight serum rather than a traditional cream. It spreads thinly across the face, sinks in quickly, and finishes with a fresh, moist look rather than a matte cast. The rating is SPF 50+ PA++++, covering both UVA and UVB. The formula is made without ingredients considered harmful to marine environments.

One note on what this listing includes: it is a single pack of the sun serum only, with no applicator, travel size, or additional items bundled in. Size, shade options, and refill formats are not part of this variant.

To get the most out of this serum, apply it as the last step in your morning skincare routine, after moisturizer and before any makeup. Use enough to cover the face and neck evenly, and give it a minute or two to fully absorb before layering anything on top. Reapplication during the day, particularly after sweating or being outdoors for extended periods, is worth building into your routine even when the texture makes it tempting to treat it as a one-and-done step. Store the bottle away from direct sunlight and heat, as UV filters in chemical sunscreens can degrade over time when exposed to those conditions.

This format works well for people who find traditional sunscreen incompatible with their daytime skincare or makeup routine, or who have previously skipped sun protection because of how it felt on the skin. The serum format also makes it easier to apply precisely without disturbing other products already on the face. When comparing options in this category, pay attention to the PA rating alongside the SPF number, since the PA++++ rating here reflects a higher level of UVA coverage than formulas with fewer plus signs. A single pack gives you one standard-size bottle, which for most daily users represents roughly one to two months of consistent use.