“Korean sheet masks are an excellent way to boost hydration, and well-hydrated skin is one of the foundations of healthy, youthful-looking skin,” says Dr. Hwang. These at-home treatments can do everything from providing “a boost of hydration” to “improving acne-prone skin, inflamed skin, dull skin, or photoaged skin.” For this list featuring the best Korean sheet masks, Glamour contributor Sarah Y. Wu traveled to Seoul for trend research and an on-the-ground look at the most popular Korean face masks of 2026 for every skin concern: dryness, dullness, wrinkles, sensitivity breakouts, and more.