3M Peltor Optime 105 over-the-head earmuffs feature double-shell technology to provide effective hearing protection. The 3M Peltor Optime 105 Over-the-Head Earmuff has been developed for effective hearing protection in the most demanding noise environments where noise exposures are expected to reach as high as 105 dBA.
https://www.amazon.com/3M-Earmuff-Protectors-Hearing-Protection/dp/B00009LI4K

