3M™ Peltor™ Optime II has been designed for demanding noisy environments, providing maximum attenuation even at very low frequencies. The ear cushions are filled with a unique combination of liquid and foam. This results in an optimal seal and low contact pressure, ensuring excellent comfort even during prolonged use. The ear cushions are equipped with ventilation channels and covered with a soft, contoured hygienic film. 3M™ Peltor™ Optime II is suitable for heavy industrial environments, construction machinery, airports, and agricultural work.Frequency: 4000HzAverage attenuation value: 34.7 dBHigh-frequency attenuation value: 2.7 dBEstimated protection value: 32.0 dBWeight: 210 g