Actually wait no I lied just then, this simple mask is my most-sold item lately, because it's set up to work with glasses. And almost nobody else makes masks that do that. (And even though I have several designs that work with glasses, this bare-bones simple one is the one that sells.)

They're quick and easy for me to make, I've just made so many copies of them this last year or so that I barely even think to photograph them anymore.