La Roche-Posay Effaclar Unclogging Purifying Sebo-Controlling Mask is a clay mask that is formulated for oily, spot or blackhead-prone skin. Clinically proven to unclog pores, purifiy, sebo-control shine and cleanse even the deep impurities caused by pollution without over-drying your skin. This dermatological clay mask absorbs sebum and impurities as well as preventing the future causes of blackheads. Enriched with argilla & kaolin which gently absorbs sebum from the skin's surface without over-drying or causing micro-inflammation of the sebaceous glands, while the kaolin helps to gently remove sebum from deep inside the skin, helping to mattify skin over time. This 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 cellubeads remove all impurities from the skin for an in-depth cleansing action. They have a magnet-like ability to absorb even the smallest and most invisible impurities in the skin, for example those caused by pollution.