Agreed, you can do it with any loose face powder. Just pat some under the eyes before applying shadow and then dust it all off when you are done. I believe in some of the pics it's MAC's Invisible Set Powder, which is a pro product. But like I said any loose will work, Invisible is nice though if you don't want any extra color. A great way to remove it when you're done is to buff it with a big powder brush and then I like to use a fan brush afterward too, just so it doesn't get cakey (I like MAC's 184 brush).