This Moroccan clay mask is fantastic. I left it on until dry and then I actually peeled back some of the larger pieces of clay, while they were still hard. Doing so removed all my clogged pores and left my skin tight and blemish free. The mask gets really, really tight as it hardens. After it was done though, my skin was soft and glowing. This is the most effective face mask I have ever tried, and two weeks later, my skin tone is still much more even than it usually is.