You could be using the best foundation in the world, but without the right tools to put it on, it could still end up looking too cakey, too streaky, or just plain meh. That’s where makeup sponges come in. What originated in triangle form back when the dinosaurs roamed the earth (or sometime just after that), have now taken on rounded curvy new shapes and colors. But what the heck is the difference between all of them? We asked makeup artist Rohit kumar to break down it down. Here’s your shorthand guide for which sponges to use when and how.