3M Peltor Optime II earmuffs with stainless steel headbands that keep their clamping force over time and across a wide temperature range. Green cups and a wide padded headband; especially effective against mid- and high-frequency noise. Versions: H520A headband (SNR 31 dB, 210 g), H520P3E helmet-mounted (SNR 30 dB, 235 g), H520F foldable (SNR 31 dB, 230 g).

• For high noise: airports, mining, heavy industry, agriculture