3M™ E-A-R™ Classic™ Uncorded , Pillow Pack 310-1001 Classic earplugs were the industry’s first foam earplugs, virtually revolutionising hearing protection. Today, the revolution continues. It meets more wearer and environmental needs with its proprietary foams, preferred cylindrical shape, and proven in-ear comfort. Reusable Pillow Pack helps keep earplugs clean when they are not being worn Slow-recovery earplug foam is flame-resistant and moisture-resistant Test compatible with 3M™ E-A-Rfit™ Validation System Moisture resistant firm foam prevents swelling and the need to refit Reduces noise levels up to 28 dB