Brand from South Korea: Etude House. Etude House Green Tea Nose Patch is a pore care nose patch containing green tea extract to make nose soft and clean. Removes blackheads and improve on enlarged pores. How to use blackheads pack: 1. After cleansing, wet nose with water, remove patch's transparent film and press smooth side of patch onto center of nose. 2. After 10-15 minutes, once patch dries up, remove patch starting from outer edges. 3. Apply toner to nose after use.