La Roche-Posay Effaclar Purifying Clay Mask has been clinically proven to unclog pores, control shine and cleanse even the deep impurities caused by pollution without over-drying your skin. 9 out of 10 dermatologists recommend La Roche-Posay Effaclar for oily, spot-prone skin. This clay mask is dedicated to oily, spot or blackhead-prone skin. It contains Argilla and Kaolin. Argilla gently absorbs sebum from the skin's surface without over-drying or causing micro-inflammation of the sebaceous glands. Kaolin helps to gently remove sebum from deep inside the skin - helping to mattify skin over time. The mask also contains 5% Panthenol B5 to soothe and calm the skin post sebum-extraction, reducing the risks of over-stimulating the sebum glands. Lastly, the Cell beads remove all impurities from the skin for an in-depth cleansing action.