The Cat Litter Face Mask: It's a Thing and We're Trying It! | Catster
http://www.catster.com/lifestyle/the-cat-litter-face-mask-its-a-thing-and-were-trying-it
As it turns out, regular natural clay litter is made of the same kind of clay that is used in a lot of mud masks you'd pay tons of money for. This isn't going to help your crazy cat lady rep, but hey, nobody needs to know.