The EP6 Earplugs have a NRR (Noise reduction rating) of 24dB and normal conversation can be heard in both quiet and noisy environments with the EP6 hazardous noise filters. This device is comfortable, low profile, capable of fitting under hats/helmets, and ideal for shooting, construction, motor sports, heavy machinery, etc. Ergonomic design and multi-flanged stem conforms to ear shape for maximum comfort and retention. Made from soft, hypoallergenic, medical-grade polymer. EP6 are sold in a single left/right set and packaged in a convenient carrying case.