AKG W81 Black Windscreen Foam For WM81 CapAKG W81 Black Windscreen Foam For WM81 Cap If your performance requires even more protection from the elements (e. g. in a windy outdoor venue), you can simply place an additional foam windscreen W81 above the the cardioid wire mesh protection cap (WM81). It increases the size of the microphone by only a fraction, and produces clean sound in challenging environments. Key Features Color: Black