The OEM E-A-Rsoft FX Corded Earplugs MMM3121260 provide effective hearing protection with a Noise Reduction Rating (NRR) of 33 dB, classified as CSA Class AL. Designed with a bell shape for easy fitting and removal, these earplugs are made from slow-recovery foam that seals the ear canal reliably. Each pair is kept clean in a poly bag before use, ensuring hygiene and convenience. These earplugs are also compatible with the 3M E-A-Rfit Validation System for testing.