North Com-Fit AB™ Reusable Earplugs are among the attenuating earplugs available. Com-Fit AB™ reusable earplugs are the only ones containing Microban® antimicrobial protection right in the material's composition. Protection from microorganisms will not wear out, rub off or wash away. Made of surgical silicone rubber, the comfort and durability of Com-Fit AB™ is unsurpassed by thermoplastic rubber earplugs. Three sizes are color coded for easy identification. Choose hard shell carrying case with chain or ziplock poly bags for storage. Hard shell plugs packaged 20pr/bx. Poly bag plugs packaged 100pr/bx NRR27