SKIN1004 Water-Fit vs. Isntree Sun Gel
A cheaper, six-ingredient serum-textured sunscreen with a wider reviewer base against a lighter watery-gel with a shorter confirmed formula.
Criteria | SKIN1004 Madagascar Centella Hyalu-Cica Water-Fit Sun Serum SPF50+ PA++++ | Isntree Hyaluronic Acid Watery Sun Gel SPF50+ PA++++ |
|---|---|---|
| Price | $9.70 | $19.00 |
| Price / unit | $0.19/mL | $0.38/mL |
| Size | 50 mL | 50 mL |
| Price checked | 10/7/2026 | 9/12/2026 |
Both are fragrance-free, lightweight textures, but SKIN1004 is cheaper and confirms a notably deeper ingredient list.
Why compare these two specifically
Two of the lighter-textured, most-discussed sunscreens in this catalog, worth comparing on price and confirmed formula depth rather than assuming 'lightweight' means the same thing for both.
Price per milliliter
SKIN1004 runs $0.36 per milliliter ($18.00 for 50mL). Isntree runs $0.38 per milliliter ($19.00 for 50mL). SKIN1004 is slightly cheaper, in the same 50mL size.
Serum texture with six confirmed actives vs. watery gel with two
SKIN1004 confirms centella asiatica, niacinamide, hyaluronic acid, adenosine, tocopherol, and green tea extract, six named ingredients in a serum-like texture. Isntree's confirmed list centers on hyaluronic acid and centella asiatica in a watery-gel texture.
A real texture trade-off on SKIN1004
SKIN1004 is one of the most reviewed K-beauty sunscreens on the market, but some report a slight sheen in humid climates. Isntree's watery-gel may need a setting powder for full shine control instead.
Our take
SKIN1004 is the stronger overall pick here: cheaper, a notably deeper confirmed ingredient list, and the wider reviewer base. Isntree's specific watery-gel texture is the real reason to pick it instead, if that particular feel matters more to you than formula depth.
SKIN1004 Madagascar Centella Hyalu-Cica Water-Fit Sun Serum: $0.36/mL. Six confirmed actives in a serum texture, cheaper and among the most reviewed K-beauty sunscreens.
Isntree Hyaluronic Acid Watery Sun Gel: $0.38/mL. A lighter, watery-gel-specific texture with a shorter confirmed ingredient list.
Browse the rest of our sunscreen coverage.
Shop these picks
Affiliate links: we may earn a commission at no extra cost to you.
Price checked 10/7/2026
Price checked 9/12/2026
Related comparisons
Frequently asked
Which has a deeper formula, SKIN1004 Water-Fit or Isntree Sun Gel?
SKIN1004, with six confirmed named ingredients versus Isntree's two (hyaluronic acid and centella asiatica).
Which is cheaper, SKIN1004 Water-Fit or Isntree Sun Gel?
SKIN1004, at $0.36 per milliliter versus Isntree's $0.38 per milliliter, both in 50 mL bottles.
Does SKIN1004 Water-Fit Sun Serum leave shine?
Some report a slight sheen in humid climates. Isntree's watery-gel texture may instead need a setting powder for full shine control.