Against melusine. To prevent hissing and howling in gusts of wind when shooting outdoors. As the air flows around the smooth obstacle, the air velocity increases, the pressure decreases, and small vortices tear off, which in turn causes further local changes in the pressure of the variable over time. Changes in air pressure over time are sound and this is a feast for the microphone, in this case undesirable. The hair on the windshield spoils this theater or at least distances it and separates it from the body of the microphone. A foam cover will also be used, which, unlike gloss or fur, is also suitable for wet use, but I think that foam has a greater loss on hiss. Imaginary filters are more effective for the "anti-pop" effect (strokes when pronouncing lip consonants), at least where they can be installed (in the studio).