Korean sunscreens are popular abroad largely because they use filters and textures the US market does not have. The labeling that goes with them follows an Asian system that does not map onto anything printed on an American bottle, which leads to a lot of confused comparison.
What PA ratings actually measure
PA followed by plus signs indicates UVA protection measured by persistent pigment darkening, an Asian standard. PA+ corresponds to a UVA protection factor of 2 to under 4, PA++ to 4 to under 8, PA+++ to 8 to under 16, and PA++++ to 16 or above. US labels instead use the term broad spectrum with a pass or fail test, giving no gradation at all. A Korean product marked SPF 50+ PA++++ is therefore stating more about its UVA performance than any US label is permitted to communicate to a consumer.
Why Korean textures are different
Korea approves a wider range of UV filters, including several modern organic filters not permitted in US over-the-counter monographs. Those filters are more photostable and cosmetically elegant, which is why Korean sunscreen feels lighter at the same SPF. It is a regulatory difference, not a marketing one. Korean sunscreens are also formulated for daily wear under makeup rather than for beach use, so water resistance claims are less common and less prominent.
The SPF number is comparable
SPF testing methodology is broadly aligned internationally, so SPF 50 in Korea and SPF 50 in the US mean similar UVB protection. Korean labels cap the printed figure at 50+ in the same way. The divergence is entirely on the UVA side. Korean testing also follows an ISO-aligned protocol, which is why the numbers are broadly comparable rather than being a different scale entirely.
The regulatory status when importing
Sunscreen is regulated as an over-the-counter drug in the US, not a cosmetic. Personal quantities for your own use are routinely admitted, but the product is not FDA-approved for sale and importing quantities for resale is a genuine compliance problem rather than a gray area. Buying a few tubes for yourself is unremarkable; ordering a case of the same SKU is what turns a personal purchase into an import question.
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Start a buy-for-me order →Frequently asked
Is a Korean SPF 50 equivalent to a US SPF 50?
For UVB protection broadly yes. Korean products additionally state a graded UVA rating that US labels do not provide.
Can I import sunscreen for personal use?
Small personal quantities are generally admitted. Commercial quantities of unapproved OTC drug products are a different matter entirely.
How many bottles is a reasonable personal quantity?
A handful for personal use raises no questions. Dozens of identical units reads as commercial intent.