Insert the yellow end and it allows clear hearing in the absence of impulse noise.
Impulse noise is instantly suppressed by a calibrated filter to a safer level.
Insert green end for steady-state 22dB protection from high-noise levels (aircraft, armored vehicles, etc.).
Comfortable triple-flange tips are based on the popular E-A-R UltraFit® design.
Fast and easy, no-roll insertion.
Used by NATO and the U.S. Military.
Green end NRR 22dB; ANSI S3.19-1974; CSA Class AL. 
