WHAT IS DUAL-LAYER POP FILTER?-Ever seen footage of your favorite artist recording their vocals in a studio? Most likely, you saw a strange black circle standing in between them and the blue yeti microphone. A pop filter,pop shield or pop screen is a circle of nylon mesh that’s positioned a few inches in front of the mic.It’s clipped to the mic stand via an 360°adjustable metal gooseneck mount.and the Pop filters can also keep saliva off the condenser microphone.