3M Peltor Optime II H520P3E helmet-mounted earmuffs are suitable for environments with significant industrial noise such as construction machinery and agricultural work. The passive earmuffs have an average attenuation value of SNR 30dB(A). - Ear muff with helmet attachment - Ear muff is especially suitable for environments with significant industrial noise such as construction machinery, airports and agricultural work - The sealing rings are filled with a unique combination of liquid and foam. The result is an optimal seal with a low contact pressure, so that the ear muff still fits comfortably even after a long time - The sealing rings have ventilation channels and are covered with soft, hygienic patterned foil - Colour: green - Average attenuation value SNR 30 dB(A)