Highly effective, ultra-comfortable, and reusable EP10 Sonic Defenders® Ultra Max earplugs provide the highest level of hearing protection of any earplugs made by SureFire"an extraordinary Noise Reduction Rating (NRR) of 30dB! These full-block earplugs feature soft memory-foam Comply Canal Tips that seal in the ear canal, blocking out potentially harmful noises and providing all-day comfort. They are an excellent choice for industrial, tactical, recreational, and everyday applications where maximum protection against continual noise levels is desired and the ability to hear ambient sounds or conversations is not a priority