The 3M™ Peltor™ Optime™ III Headband Hearing Protectors (H540A-411-SV) are engineered for use in extremely noisy environments, offering superior hearing protection. These black and red earmuffs feature innovative double housing technology that minimizes resonance within the cups, resulting in maximum high-frequency attenuation. An acoustic connection between the inner and outer housing further enhances performance by providing excellent low-frequency attenuation. Designed for comfort during extended wear, they are equipped with wide, soft foam-filled sealing rings that ensure optimal sealing and low contact pressure. With an impressive Signal-to-Noise Ratio (SNR) of 35 dB, and attenuation values of 40 dB (H), 32 dB (M), and 23 dB (L), the Optime III is highly effective against extremely low frequencies. Constructed from durable ABS material, they meet the EN 352-1:2002 standard. Ideal for industrial settings such as airports, power stations, engine rooms, printing works, cement production, shipbuilding, and heavy engineering.