• 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)