3M™ E-A-R™ Classic™ Earplugs 311-4101, Metal Detectable, Poly Bag, 2000 Pair/Case

3M™ E-A-R™ Classic™ Earplugs have set the industry standard for noise reduction as the world's first foam earplugs. These earplugs are made of a proprietary soft energy-absorbing slow-recovery foam that's designed to conform to the shape of the ear canal to help provide hearing protection.