This is a black sheet –type mask that contains black charcoal extracts which removes dirt and oil from pores. Dear Derm Black Charcoal Mask is specially formulated to clean your pores and vitalize your skin. Black charcoal increases its absorbency. It will act like a magnet to attract and absorb dirt and oil. When dirt and oil in your pores come in contact with the carbon, they stick to it and then get washed away when you rinse.