Corded earplugs are optimized for exceptional in-ear comfort. Four-flange design creates a better seal in your ear canal to deliver optimal protection and increased comfort for long-term wear. Internal fins create an interlocking, noise-blocking barrier within the air pocket, providing dependable attenuation for all wearers upon proper insertion. Firm stem and tapered shape facilitate easy insertion and removal, and allow the earplug to sit comfortably in your ear canal. Earplugs are designed with a Noise Reduction Rating (NRR) of 27.