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 and conservation. 3M™ Disposable Earplugs, made from expandable slow-recovery foam conforms to the shape of the ear canal to help create a comfortable, snug noise barrier whilst providing protection for users. Packed into poly bags for hygiene to keep earplugs clean and free from dust. Earplugs are both flame-resistant and moisture-resistant and have a SLC80 (sound level conversion) rating of 23dB (Class 4). Recommended applications are facility maintenance, grinding, electrical, machine operations, sanding, welding, demolition, painting, blasting, assembly and cleaning.