EP9 Sonic Defenders Cobalt Max earplugs are the best choice for use in food and pharmaceutical processing and similar industries. Their soft, adjustable, triple-flanged stems seal the ear canal and block out potentially harmful noises, providing an impressive Noise Reduction Rating (NRR) of 26 dB. They're a great choice for applications where a high level of protection against continual noise is desired and the ability to hear ambient sounds or conversations is not a priority.* Constructed of a proprietary metal-infused polymer that's detectable by industrial scanner, EP9s are bright blue in color and feature permanently attached lanyards.