3M Peltor Optime 101 cap-mounted earmuffs feature a stainless steel headband for consistent force and effective hearing protection. For noise levels up to 101 dBA, these cap-mount earmuffs provide effective hearing protection.• Cap-mounted design allows for easy use with most hard hats• Liquid/foam filled ear cushions• Color-coding for compliance sighting• Noise Reduction Rating (NRR)*: 24 dB. CSA Class A*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.

• Cap-mounted design allows for easy use with most hard hats.
• Color-coding for compliance sighting.
• Noise Reduction Rating (NRR)*: 24 dB. CSA Class A.
• *The NRR may overestimate the hearing protection provided during typical use.