Pop filters are used to avoid sharp "P" and "B" sounds from overloading the mic level and causing distortion; these are known as ‘plosives. Most commercial pop filters are $20-40, but you can build ...

Pop Filter for Mic - This microphone accessory fits perfectly on Fifine microphone such as Fifine K669/669B, K670/670B, K683A, K678 and K690. Also suitable for mics that are between 1 3/5'' and 2 3/5' ...