The 3M E-A-R Reusable Earplugs are made from flexible materials that are preformed to fit the ear. They are generally available with a joining cord to prevent loss. These reusable earplugs are comfortable, hygienic and economical. No sizing is required for these pre-moulded, triple flange earplugs. Manufacured to EN352-2, SNR32. Each 3M UF-01-000 Ultrafit Ear Plugs (Pairs)