High-Density Noise-Canceling Foam "Dome" with built in pop-filter.  - The studio-grade noise-canceling foam captures and absorb noise to prevent sound reflections from being picked up by the microphone. It also blocks blocks unintended environmental sounds from entering the microphone.  -The built in, removable pop-filter blocks out the annoying hissing sound of the letter "s"  and blocks the unwanted "plosives" that follows "B's" and "P's" in your vocals.  -Suitable for most of microphones. Microphone insert diameter is 45mm-60mm / 1.77''-2.36''. Having a noise canceling shield couples with a pop filter will improve live and recorded vocals.