Peltor Optime ll H520B Neckband Ear Muff - Conforms to EN 352-1 - SNR 31 - [3M-H520B-408-GQ] - (PS)
Developed for demanding noise-hazard environments and muffles even extremely low frequencies to a maximum degree. The sealing rings, filled with a unique combination of liquid and foam results in an optimum seal with low pressure contact providing snug comfort even over long-time use.