Make sure to clean your face and hands before you apply them. Clean the area to be treated and let it dry. Attach a suitable-sized patch that best fits the whole lesion in the center of the patch. Replace with a new patch when the patch turns white (usually every 8-10 hours). The patch turns white/opaque-colored when it absorbs pus and impurities.

Cosrx Acne Pimple Master Patch