3M Earmuff, Black/Maroon, Ear Muff Style: 3-Way Multi-Position, Dielectric: Yes, 20/22dB Noise Reduction Rating, Material: ABS, Standards: ANSI S3.19-1974, CSA Class B, Applications: For Assembly, Cleaning, Demolition, Electrical, Facility Maintenance, Grinding, Machine Operations, Painting, Sanding, Welding, Ear Cushion: Foam Filled Cushion
- Large earcup openings and soft, foam-filled cushions offer a snug, comfortable fit
- Durable, lightweight construction of non-conductive, dielectric plastic
- Noise reduction rating NRR 20 dB (CSA class B) when the band is worn over-the-head. NRR 22 dB (CSA Class A) when the band is worn under-the-chin. NRR 22 dB (CSA Class B) when band is worn behind-the-head