3M Filtered Combat Arms Ear Plugs

Hear-through protection. These ear plugs feature a special acoustical filter that lets lower level sound through with relatively little noise reduction for greater situational awareness, and provides increasing amount of peak noise reduction as sound levels increase above 110 dB. Open or close the small filter switch to choose between modes. Available with medium or large plugs. SNR = 16dB open or 28dB closed. Spare plugs also available.