Ear Plug w/o Cord (NRR 29 dB) 200 Pair Per Box by 3M, MS-92100

Timeless design has proven itself in the field for over 28 years. Its dermatologically safe foam provides a comfortable seal while exerting little pressure on the ear._x000D_ 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 attenuating noise. Consult the enclosed instructions for proper fit. 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 of continuous noise and may not be an accurate indicator of the protection attainable against impulse noise, such as gunfire. Improper fit of this device will reduce its effectiveness in attenuating noise._x000D_ Ear plugs must be worn at all times in noisy surroundings for proper protection. _x000D_The level of noise entering a person’s ear, when hearing protection is worn as directed, is closely approximated by the difference between the A-weighted environmental level and the NRR.

Flame retardant. NRR is 29 decibels ( dB ). 200 Pair Per Box. Moisture resistant will not absorb moisture and swell. Pillow Packs may be reused for convenience and storage. The environmental noise level at the ear is 92 dB(A). The level of noise entering the ear is approximately equal to 63 dB(A). Fast Shipping so buy with confidence.