3M™ E-A-R™ Classic™ earplugs set the standard in hearing protection as the world's first foam earplugs. Constructed from slow-recovery foam, these low-pressure earplugs are uniquely moisture-resistant. Value Pak includes 500 pair of bulk earplugs loose in each dispenser box. Benefits •Econopack gives you the best value—with savings of up to 20%. •Earplugs are not packaged in pairs; 500 pair of bulk earplugs loose in box. •Flame-resistant and moisture-resistant •Noise Reduction Rating (NRR)*: 29 dB. CSA Class AL •Test compatible with 3M™ E-A-Rfit™Validation System.