Peltor 3M combat arms earplugs - Gen 4.1

 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 noise reduction as sound levels increase above 110dB. Open or close the small filter switch to choose between modes.

The 3MTM Combat Arms TM Earplugs – Generation
4.1 contain a housing assembly featuring a rocker switch. When the tab featuring the 3M logo
is pressed, the device is in the Closed Mode and acts as a conventional earplug. The Closed Mode provides protection against all types of noise, and should be the only mode used for steady noise such as aircraft, vehicle, generator and watercraft.
When the tab featuring the CAE logo with a tiny hole marking is pressed, the device is in the Open Mode and allows some sound to pass through. The Open Mode may assist the user with improved situational awareness in quiet environments while still helping protect hearing from impulse noise such as weapons fire.*
Available in small, medium and large tip sizes to fit most ear canals
Designed to allow wearer to hear non-impulse, low-level sounds when in the Open Mode
Soft, flexible retainer
Ergonomic rocker switch – easy to switch
while in ear, even when wearing gloves
Easy to clean
No batteries required