3M™ E-A-R Classic Foam Earplugs, Metal Detectable, Corded, Poly Bag, 200 Pairs (MMM3114101) 200 Pairs3M E A R Classic Foam Earplugs 311 4101 Flame retardant. Foam is non irritating. Moisture resistant. Shape prevents shifting and keeps effectiveness of noise seal constant. Slow recovery PVC foam provides comfort with low pressure. Global Product Type: Single Use Ear Plugs Corded Cordless Pair: Corded Shape: Cylinder Material(s): PVC Foam Noise Reduction Rate (NRR): 33 dB Size Group: Large Color(s): Yellow Product Biodegradability in Days: 0 Pre