3M 7000009666 Peltor Optime Earmuffs 21 Db Nrr

Product Description

The 3M 7000009666 is a behind-the-head style hearing protector from the Peltor Optime line, designed for environments with noise levels up to 95 dBA. The earmuffs carry a Noise Reduction Rating (NRR) of 21 dB and are certified CSA Class B. Liquid and foam filled cushions provide a consistent acoustic seal while keeping weight low at 0.55 pounds. Low-profile earcups are engineered to sit close to the head, reducing interference with helmets, safety glasses, face shields, and other PPE commonly worn on the job site or in industrial settings. Licensed trades and safety-conscious professionals in construction, manufacturing, and utilities rely on this style for all-day wearability.

This earmuff is suited for residential and commercial job sites, industrial facilities, manufacturing floors, and utility work environments where sustained noise exposure is a concern. The behind-the-head configuration is particularly practical when a hard hat or bump cap occupies the top of the head. The low-profile earcup design allows simultaneous use with helmets and eyewear without compromising the acoustic seal. Color-coded earcups aid supervisors and safety officers in confirming compliance at a glance across a work area.

Key Features

• 21 dB NRR rating for environments up to 95 dBA
• Behind-the-head band configuration compatible with hard hats and helmets
• Stainless steel construction resists bending and warping under repeated use
• Earcup pivot points tilt to conform to individual head geometry for a better seal
• Liquid and foam filled cushions reduce weight and maintain comfort during extended wear
• Color-coded design supports compliance sighting on the job site

Compatibility

Designed for use as a behind-the-head hearing protector compatible with most hard hats, safety helmets, safety eyewear, and face shields commonly used in construction, industrial, and utility trades.

Installation Notes

No tools are required to fit or adjust these earmuffs. Ensure the band is seated securely behind the head and the earcups form a complete seal around both ears before entering a noise-hazardous area. Inspect cushions regularly for cracks, hardening, or deformation that can degrade the acoustic seal. Replace cushions or the full unit per your facility hearing conservation program requirements under OSHA 29 CFR 1910.95.

Technical Specifications

• Noise Reduction Rating (NRR): 21 dB
• Maximum Rated Noise Level: 95 dBA
• Certification: CSA Class B
• Wear Style: Behind-the-Head Headband
• Cushion Fill: Liquid and Foam
• Frame Material: Stainless Steel
• Weight: 0.55 pounds
• Length: 22.88 inches
• Width: 14.63 inches
• Height: 7.88 inches
• UPC: 10093045080622

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000009666