NRR 25dB // SNR 30dB
Three flexible rubber flanges form a secure seal
Reusable earplugs can be cleaned with soap and water
The level of noise entering a person’s ear, when hearing protection is worn as directed is approximated by the difference between
the A-weighted environmental level and the NRR.
Example: 1. The environmental noise level at the ear is 92 dB(A).
2. The NRR is 32 decibels (dB).
3. The level of noise entering the ear is approximately equal to 60 dB(A).
CAUTION: For noise environments dominated by frequencies below 500 Hz, the C-weighted environmental noise level should be
used. Improper fit of this device will reduce its effectiveness in continuous noise. Plugs should be inserted with a gentle
rocking; twisting motion while opposite hand is opening ear canal by pulling the top of ear. Although hearing protectors can be
recommended for protection against the harmful effects of impulse noise, the Noise Reduction Rating (NRR) is based on the
attenuation noise and may not be an accurate indicator of the protection attainable against impulsive noise, such as gunfire.