3M™ E-A-R™ Classic™ uncorded earplugs set the standard in hearing protection as the world's first foam earplugs. Constructed from slow-recovery foam, these disposable earplugs are uniquely moisture-resistant. Benefits •Poly bag keeps disposable earplugs clean before use. •Flame-resistant and moisture-resistant •Noise Reduction Rating (NRR)*: 29 dB. CSA Class AL. •Test compatible with 3M™ E-A-Rfit™ Validation System.