The 3M Peltor Optime II H520F409GQ are green headband earmuffs designed for demanding noise-filled environments, offering an SNR of 31dB. These hearing protectors are ideal for use in settings with substantial industrial noise, construction machinery, airports, and agricultural work. The earmuffs feature unique sealing rings filled with a combination of liquid and foam, ensuring an optimum seal with low pressure for comfort during long-term use. The sealing rings also include ventilation channels and are covered with a soft, hygienic foam film. Certified to EN 352-1 standards, they provide high-level hearing protection.