It is the Rycote 45/100 Large Diaphragm Mic Foam Windscreen, a professional-grade, slip-on windscreen specifically designed for large-diaphragm shotgun microphones. This high-quality windscreen is crafted from durable, open-cell acoustic foam, providing an effective solution for reducing light wind and pop noise during audio recording. With the ability to offer up to 20 dB wind noise attenuation, this reliable microphone accessory ensures minimal high-frequency loss, preserving the integrity of your audio output. Moreover, the Rycote 45/100 windscreen is engineered with superior foam that exhibits excellent resistance against potential damage from moisture and UV light. This makes it an ideal choice for outdoor recordings or sessions in challenging weather conditions. With its secure fit and effective noise reduction capabilities, this windscreen is a valuable addition to any professional audio recording setup.