1. After cleansing your face, apply the COSRX AC Collection Blemish Care Sheet Mask to your skin, carefully adjusting it to the contours of your face.  
2. Leave on for 10 to 20 minutes.  
3. Remove the mask then gently pat the excess serum for better absorption.  
Our team recommends using this mask 2 to 3 times a week for best results.