The 3M Peltor X4A Headband Earmuffs are lightweight and slim hearing protectors designed for high-performance protection against moderate-to-high level industrial noise and other loud sounds. They feature innovative foam earcup inserts and spacers, along with new ear cushion technology, to boost attenuation. The electrically insulated (dielectric) twin headband design helps reduce heat build-up on top of the head, ensuring comfort during prolonged wear. These earmuffs are tested to EN 352-1 and EN 352-3 standards, offering up to 33 dB attenuation, and also have an NRR of 27 dB and an SLC80 of 31 dB (Class 5). The Hi-Viz green and black color scheme makes them easily identifiable.