• 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 160 dB peak
• Specially designed soft retainer helps ensure the ear plug remains seated inside the ear canal
• Easy to wash and clean

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 increase above 110 dB.