As it hints at in the name, the Wildsmith Double Clay Refining Mask (£65) contains two types of mineral-rich clay: kaolin, to gently clear out pores, and bentonite, a clay derived from volcanic ash that has anti-inflammatory properties. But this isn't your average clay mask that will suck all of the moisture out of your skin. The formula also contains hyaluronic acid and capiscum, an ingredient extracted from chillis that actually warms the skin slightly, helping to increase both blood flow and cell activity.