Peltor™ 7000009670 Optime™ Lightweight Noise Reduction Earmuff, 25 dB Noise Reduction, Black/Yellow, Over The Head Band Position, ANSI S3.19-1974, CSA Class AL Peltor™ 7000009670 Optime™ Lightweight Noise Reduction Earmuff, 25 dB Noise Reduction, Black/Yellow, Over The Head Band Position, ANSI S3.19-1974, CSA Class AL