Beauty Clinic MediHeal Vita Lightbeam Essential Mask - made in Korea
You can also find this product under the name "Leaders Clinic Clinie" instead of Beauty Clinic MediHeal. This is a popular brand in Korea and also liked by many Korean celebrities. I've seen other websites and blogs say that this brand is dermatologist tested and each mask contains an entire bottle of "of highly concentrated ampoule of nutrients and vitamins," but it doesn't say any of that on the package (at least not in English) so I can't confirm.