this unique hydrating primer instantly protects the face by preventing the adhesion of pollution particles that cause damage to the skin. with SPF 50, it is also a UV primer protecting against UV rays while keeping skin moisturized. 30ML.block:booster uses Color Boosting Gel to create a smooth skin surface with light-reflecting properties, leading to a natural glow with increased foundation adhesion. it is also formulated with True Color Powder, which absorbs excess sebum, preventing an oily shine. this results in the foundation's true color lasting longer and the skin maintaining a fresh and attractive look.its lightweight texture is fresh and comfortable and spreads easily.after cleansing, take an appropriate amount on the palm and spread gently on face.