The OEM 3M E-A-Rsoft Yellow Neons Corded Earplug MMM3111250 provides excellent noise reduction and comfort with its soft, slow-recovery foam that seals the ear canal. Designed in a regular size to fit most ear canals, these earplugs come in a poly bag to keep each pair clean before use. With a Noise Reduction Rating (NRR) of 33 dB, they are classified as CSA Class AL and are test compatible with the 3M E-A-Rfit Validation System.