E-A-Rsoft FX Earplugs are designed for high noise-exposure areas. Large bell shape of soft foam delivers a comfortable fit. Flared end allows you to easily remove from your ears. Soft, slow-recovery foam helps ease insertion. Earplugs meet 3M's maximum noise reduction rating (NRR) of 33 decibels for optimal hearing protection. They are part of 3M's E-A-Rfit Dual-Ear Validation system that helps determine whether workers are receiving adequate protection by measuring earplugs across seven standard frequencies in under 5 seconds. Use them in industries such as automotive, general manufacturing, sub applications, military maintenance, repair and operation, mining\/oil\/gas, pharmaceutical and transportation.