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, the disposable earplug comes in a clean, convenient pillow pack. Benefits •Reusable Pillow Pack helps keep earplugs clean when they are not being worn. •Slow-recovery earplug foam is flame-resistant and moisture-resistant •Noise Reduction Rating (NRR)* 29 dB. CSA Class AL. •Test compatible with 3M™ E-A-Rfit™ Validation System