Using the Goodal Mild Sheet Mask is easy. First, make sure your face is clean and dry. Take a sheet mask out of the package and unfold it. Place it gently on your face, adjusting it to fit your features. Leave it on for about 15 - 20 minutes. Then, remove the mask and gently pat the remaining essence into your skin. You don't need to rinse it off. For best results, use it daily or as often as your skin needs. Keep the masks in a cool, dry place away from direct sunlight. If you have sensitive skin, it's a good idea to do a patch test on a small area of your skin before using the mask for the first time.