COSRX Acne Pimple Master Patches are a fan favourite pimple patch that helps to effectively extract and heal pimples. The clear and thin hydrocolloid patch works by extracting out any impurities from the pimples as it seals off the problematic area and protects the wound from external bacterial. These acne pimple patches create the most optimal moist environment that speeds up the healing process and prevents a secondary infection and future breakouts. These acne pimple patches come in 3 different sizes and can be used underneath makeup for a flawless look, so you don't have to worry about pimples before an important event.