Short verdict
Buy in Korea. Best purchased during a Korea trip, usually because of local access, price, testing, or limited bundles.
Korean sunscreens are popular for lightweight textures and daily-use finishes.
What to know
Buy in Korea if you want to compare textures and find promotions. Buy online if you already know your skin compatibility and need reliable reorders.
What to avoid
Skip buying many tubes before patch testing, especially if your skin reacts to fragrance or alcohol.
Final verdict: test in Korea, reorder online.