La roche posay introduces their first dedicated clay mask it absorbs sebum and impurities as well as preventing the future causes of blackheads it is clinically proven to unclog pores control shine and cleanse even the deep impurities caused by pollution without over drying your skin containing argilla and kaolin argilla gently absorbs sebum from the skins surface without over drying or causing micro inflammation of the sebaceous glands kaolin helps to precisely remove sebum from deep ins