Mack's Ear Seals® Dual Purpose Ear Plugs w/ Leash Dual-purpose earplugs – reduce noise and seal out water Dual-durometer design provides a unique combination of super-soft seal rings for unmatched comfort and a stiffer inner core for ease of insertion Detachable cord allows user to conveniently hang the earplugs around neck in environments where noise comes and goes Washable and reusable Great for power tools, swimming, loud concerts, shooting sports, motor sports, etc. Includes storage case Noise Reduction Rating (NRR) – 26 decibels