3M™ Peltor™ Optime™ 105 behind-the-head earmuffs features low-profile earcups that fit well with most helmets, Feature double-shell technology for effective hearing protection.
For noise levels up to 105 dBA, these behind the head earmuffs feature double shell technology to provide effective hearing protection Patented Twin Cup(TM) design has soft, foam filled earmuff cushions. Behind the head design allows for easy use with hard hats. Liquid/foam filled earmuff cushions. Color coding for compliance sighting. Noise Reduction Rating (NRR)*: 29 dB. CSA Class AL *The NRR may overestimate the hearing protection provided during typical use. 3M recommends reducing the NRR by 50% for estimating the amount of noise reduction provided. 3M is Leading the Advancement of Hearing Conservation™.