Apply generously as the final morning step. The Korean-market formula uses a modern multi-filter system and wears like a hydrating lotion, making it particularly good for normal, dry, or combination skin.
In the U.S., the official domestic option is the separately formulated Birch Moisturizing UVLock SPF 45+ Broad Spectrum. European shoppers can usually purchase the SPF 50+ PA++++ version through Korean importers. This is a genuine Korea-trip upgrade: seek the tube labeled SPF 50+ PA++++ at Olive Young, because its newer filters, lighter finish, and lower Korean price are preferable to the U.S.-specific UVLock formula. Do not buy from an unverified marketplace seller; the similar packaging makes counterfeits and version confusion too easy.