Moldex 6844 Pura-Fit Cordless Earplugs — NRR 33 NRR 24 The Class C rating means

The Class C rating means the dry chemical agent is non-conductive

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Moldex 6844 Pura-Fit Cordless Earplugs — NRR 33 NRR 24 The Class C rating meansEDITORIAL REVIEW: 4. 4 5WC Safety Review Moldex 6844 Pura Fit Cordless Earplugs Best For: corded single use foam hearing protection at NRR 33 dB in a low profile uncorded design. Not For: non noise hazards, or noise that earplugs alone can't bring under ~85 dBA (add earmuffs). Bottom Line: a practical single use foam plug at NRR 33 dB the uncorded low profile fit suits tight spaces and high volume single use. Editorial assessment by Steven Eaton, WC