Apply the ABIB Gumy Sheet Mask Vita Sticker to clean, toned skin after your cleanser. Adjust the mask to fit your face well and leave it on for 10 to 20 minutes to enjoy the vitamin boost. Remove it, then gently pat the excess serum until fully absorbed, without rinsing. Use it 2 to 3 times a week, preferably in the evening, then follow with your moisturizer to lock in all the active ingredients.