With The PF8 you can minimize background noise and unwanted ambience in untreated or under-treated rooms, giving you sound booth quality vocals anywhere you take it! it also doubles as a pop filter, minimizing plosives (air bursts) on your microphone's capsule for smooth vocal tracking. It is also great for reducing bleed in your mic when live tracking a whole band. Just put your mic on a stand and then slide the foam enclosure over the mic through the hole in the bottom. The pop filter can also be removed to check positioning on the microphone capsule. The PF8 works best with microphones that are 1.77-2.36" in diameter.