Sulfur SPOT&MASK is a powerful spot treatment (& mask) made of clay, zinc, sulfur, and glycolic. This powerful blend starts to zap whiteheads and bacteria in a matter of minutes and can also be used as a preventative mask. Benefits: These 4 key active ingredients are like action heroes with different powers. You can utilize this formula to treat one-off breakouts as they arise or as a wash-off mask as often as you need. Sulfur and zinc are beneficial for acne due to their anti-inflammatory properties while the clay and glycolic dry out impurities and excess oil. It is important not to overuse this product as it is powerful and could lead to excess dry or irritated skin if you overdo it.