Soft, roll-down foam earplugs expand to fit the earcanal and provide a low-pressure, comfortable seal. Poly bag keeps each pair of earplugs clean before use. Noise Reduction Rating (NRR): 32 dB. CSA Class AL. Test compatible with 3M E-A-Rfit Validation System. The NRR may overestimate the hearing protection provided during typical use. 3M recommends reducing the NRR by 50% for estimating the amount of noise reduction provided. 3M is Leading the Advancement of Hearing Conservation.
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