3M PELTOR X4 Earmuffs X4P51E, Hard Hat Attached
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- Noise Reduction Rating (NRR) between 25–27 dB (depending on the attachment type)
- Low-profile cup design for improved compatibility with other personal protection equipment (PPE)
- High ratio of NRR to earcup depth
- 3M™ E-A-Rfit™ Dual-Ear Validation System testable
- Slow-recovery, high-density foam
- Replaceable ear cushions and foam liners (hygiene kit HYX4)