Noise reduction rating: Verify the NRR before you purchase. The higher the rating, the greater seem the earplugs can block out. Howard Leight earplugs are designed to present hearing protection for people who work around loud noises and industrial environments. So, these earplugs also element a reasonably high NRR (33 https://raymondxywql.theideasblog.com/24158023/the-definitive-guide-to-youth-ear-plugs