PE Foam Optimal Fit for Smaller Ear Canals: Designed specifically for smaller ears, the low density polyurethane foam expands gently in the ear canal to deliver comfortable long-term wear Promotes Workplace Hygiene: Smooth, soil-resistant closed-cell foam skin prevents dirt build-up to keep ear canals clean and help inhibit ear infections Superior Hearing Protection: The expanding foam and contoured T-shape provide a secure, noise-blocking fit that delivers a superior Noise Reduction Rating (NRR) of 30 Easy Insertion & Removal: The earplug's unique T-shape allows for easy gripping between thumb and forefinger for quick, no-fuss insertion and removal Recommended Industries: Agriculture, construction, fire, forestry, government, law enforcement, manufacturing, mining, steel and metal, transportation, utilities, welding 50 pairs of earplugs per pack