These hypoallergenic polymer earplugs offer a high level of protection, when blocking out hazardous noise is more important than the ability to hear ambient sounds. Designed for continuous all-day wear in industrial environments, they're reusable for up to 3 to 6 months or more, depending upon usage and care. A carrying case and attached polymer cord help prevent loss. Ear Plugs, Corded, Flanged, 26dB, PR