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 COMFORT & CONVENIENCE: Soft PE Foam enhances comfort for long-term wear, which helps promote workplace hearing safety; corded for easy carrying around neck; 100 pairs of earplugs per pack RECOMMENDED INDUSTRIES: farming, chemical, construction, law enforcement, manufacturing, military, mining, municipal, oil & gas, pharmaceutical, steel, metal, transportation