I frequently buy masks from SNP, and the charcoal ones are great for removing impurities from your skin. This mask moisturizes my skin a lot and I've used it before with no problems, but strangely enough, I found myself with a few new pimples the next day after I had used one of these masks recently. I think it might be more of the mask bringing things up to the surface of my skin rather than irritating my skin, but be careful if you have sensitive skin!