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. Still one of the most widely used foam earplugs today, the 3M E-A-R Classic earplug is an economical, reliable choice in hearing protection. – Reusable Pillow Pack helps keep earplugs clean when they are not being worn. – Conforms to the shape of the earcanal to help create a comfortable, snug noise barrier – 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. *The NRR may overestimate the hearing protection provided during typical use. 3M recommends reducing the NRR by 50% for estimating the amount of noise reduction provided. 3M is Leading the Advancement of Hearing Conservation.