3M™ E-A-R™ Classic™ corded 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 each pair of disposable earplugs available or accesible for re-use. •Flame-resistant and moisture-resistant. •Corded for easy short term storage around the neck. •Test compatible with 3M™ E-A-Rfit™ Validation System. •Noise Reduction Rating (NRR)* 29 dB. CSA Class AL