A must in many applications, but check it regularly.
This pop filter is essential on my old Shure Unidyne III mic; its built-in screen doesn't take windy days outdoors well. BUT... this is the second screen I've had to buy in the past few years. Evidently the foam Shure uses isn't terribly 'chemically stable,' and it decomposes pretty quickly. This seems true of most open-cell foams, but my first screen seemed to go fast. Justin Boller, a senior applications engineer at Shure recommended storing the screen separately from the mic as a good idea, so now I pull it off, put it in a food-grade zip-lock baggie and then in the mic locker. It's too bad that Shure doesn't make just the foam screen available separately as that machined aluminum mounting ring must be the major expense of this part.
Verified purchase: YesCondition: New