3M Peltor X5A vs X4A: NRR 31 vs NRR 27 — Which Ear Muff Do You Need? (2026)
The 3M Peltor X5A and 3M Peltor X4A are both over-the-head passive muffs from the same X-Series lineup. Same brand, same platform, same basic form factor. The only real question is whether those extra 4 NRR points — and the premium that comes with them — are justified for your noise environment.