The 3MPELTOROPTIMEII earmuffs are specially designed for high noise environments and are highly effective in attenuating extremely low frequencies. The H520F has a foldable headband with green capsules and an attenuation value of SNR = 31 dB. Thanks to the slim capsule design, the OPTIMEII guarantees an extraordinary wearing comfort. The generous space under the capsules minimizes heat build-up and sweat formation and offers a pleasant wearing feeling even during continuous use. Additional ventilation ducts on the sealing rings ensure optimum heat dissipation. The soft, wide sealing rings are filled with a unique combination of liquid and foam and guarantee a particularly weak contact pressure while ensuring optimum sealing. A constantly low contact pressure is also ensured by the flat head brackets as well As The Two point suspension made of stainless steel. The headband is adjustable and fits perfectly to any shape of the head thanks to its ergonomic shape. The areas of appli