Corded "DYNA-FIT" Disposable Earplugs | 100 Pairs | Dynamic Meets ANSI S3.19-1974 Regulation & Canadian Class A(L) Standards NRR 32 dB Excellent protection - Very high absorption level Excellent sound - Top voice recognition The ergonomically shaped Dynamic "Dyna-Fit" Red-with cord, 1 pair per bag, 100 bags per dispenser box Disposable earplugs are characterized by very high sound absorption levels, making it suitable for use in very loud environments. The "Dyna-Fit" foam earplug has a sealed surface, preventing foreign bodies from penetrating the plug. The soft foam offers real comfort, even when worn for extended periods. The "X" embossed in the end of the plug makes it easy to remove while simultaneously reducing the pressure on the outer wall of the ear canal.