Ever used a tube of Mint Julep Clay Mask? That stuff is amazing (for blackheads and pores) and it's relatively cheap but for people with dry or sensitive skin the clay mask can irritate your skin. The reason is the clay mask draws out oil and impurities leaving you the matte feeling. However, if you have dry skin it will take out most of your moisturize (you can tell if you feel tightness on your skin and if your skin is red after using the mask).
Here's a homemade alternative to Mint Julep Clay Mask for dry and sensitive skin. Great for healing acne!