3M e-a-r classic foam earplugs, uncorded, 310-1060, 30 pairs 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. 3Mrecommends reducing the nrr by 50% for estimating the amount of noise reduction provided. 3Mis leading the advancement of hearing conservation.