Sleep masks are generally hydrating. Usage: Skin care at night, after cleansing and applying make-up water and lotion, apply proper amount to face evenly, and go to bed after about 20 minutes until the mask is dry.

After getting up the next day, wash your face with facial cleanser as usual. If you don't want the mask to stay overnight, you can even apply it to your face for massage. After its essence is fully absorbed, wash it after 15~20 minutes.

If you have oily skin, don't buy anything particularly sticky.

There are many kinds, buy them according to your own needs!