- Noise Reduction Rating (NRR) of 27 dB
- 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)