PE Foam Imported HIGHEST NOISE REDUCTION (NRR 33): MAXIMUM Disposable Foam Earplugs offer the highest noise reduction rating of any disposable earplugs on the market; they are also the most used PE foam earplugs worldwide. CONFORMS TO INNER EAR: The bell shape matches contours of your inner ear to ensure maximum noise reduction and hearing protection; it also helps resist the tendency to back out of ear canal. PROMOTES PROPER HYGIENE: Push-in earplugs feature a smooth, soil-resistant closed-cell foam skin to help prevent dirt build-up and promote overall ear safety. LONGWEARING COMFORT: Soft polyurethane foam enhances comfort for long-term wear, which helps promote hearing safety in the workplace; 200 pairs of earplugs per pack. RECOMMENDED INDUSTRIES: farming, chemical, construction, law enforcement, manufacturing, military, mining, municipal, oil & gas, pharmaceutical, steel, metal, transportation.