3M COMBAT ARMS 4.1 EARPLUGS

Product Details
Hear-Through Protection.  Earplug features 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  increases above 110 dB.
Earplug with a filter that offers situational awareness, and  provides increasing amount of peak noise reduction as sound levels  increase above 110 dB
Rocker switch is marked with ‘3M’ and ‘CAE’ for easy switching between Closed Mode and Open Mode
In Closed Mode the earplug acts as a conventional earplug offering protection against steady state and peak impulse noise
Offers high attenuation against peak impulse noise- can be used up to 160dB peak
Specially designed soft retainer helps ensure the ear plug remains seated inside the ear canal
Easy to wash and clean
Closed Mode
Constant protection from noise
Everything will sound quieter
Defense against impulse noise
NRR 21
Choose Closed Mode for situations in which you need protection  or relief from constant background noises, in addition to protection  against blast noise. For tasks such as extended shooting, firing at an  indoor range, or personal use of power tools, or yard work, this  constant passive protection is a familiar and effective defense from any  hazardous noise.
 
Open Mode
Hear safe ambient sound clearly
Maintain situational awareness
Defense against impulse noise
NRR 8
Choose Open Mode for situations in which you need to be able  to hear ambient noises such as voices, announcements, or prey sound. In  this mode, Combat Arms allows you to hear clearly with little  interference, preserving your situational awareness. But when a  hazardous blast noise occurs, the internal noise filters immediately  baffle the sound, keeping your ears protected.