The Shure A2WS is a professional accessory designed to enhance the performance of the iconic SM57 dynamic microphone by effectively mitigating plosive sounds and wind noise. This locking windscreen, often called a "popper stopper," features a dual-layer design with an inner open-cell foam layer and an outer synthetic mesh layer that work in tandem to dissipate the explosive breath energy from "p" and "b" sounds without compromising the microphone's characteristic frequency response. Its key innovation is a secure locking mechanism that allows it to be firmly attached to the SM57's grille, preventing rotation or dislodgement during handling or performance, which ensures consistent protection and reliability in live sound and studio recording environments.

Constructed from durable materials, the A2WS is engineered to withstand the rigors of constant use while maintaining its acoustic properties. The windscreen slides over the microphone's grille and locks into place with a simple twist, creating a stable and precise fit that does not muffle or alter the essential tonal qualities of the SM57. This makes it an invaluable tool for vocal applications where the SM57 is employed, such as live singing or aggressive studio vocals, as it allows engineers to achieve a cleaner signal at the source, reducing the need for excessive post-processing to remove low-frequency thumps caused by plosives.

The accessory is particularly favored in broadcast, podcasting, and stage settings where microphone handling is frequent and vocal clarity is paramount. By providing a dedicated, lock-on solution, the A2WS addresses a common challenge when using the SM57 for close-miked vocal work, transforming it into a more versatile microphone for speech and singing. It exemplifies Shure's commitment to practical problem-solving through accessories, extending the functionality and application range of a classic microphone with a simple, effective, and robust add-on.