These dual-purpose earplugs seal out water and reduce noise with a noise reduction rating (NRR) of 27 decibels. Mack’s® Ear Seals® feature a dual durometer design (2 plastics are used in the molding process). This creates a unique combination of super-soft seal rings for unmatched comfort and a stiffer inner core for ease of insertion. The detachable cord allows you to conveniently hang the earplugs around your neck in environments where noise comes and goes. Washable and reusable. For power tools, swimming, loud concerts, shooting sports, surfing, motor sports, etc. Shatterproof carrying case included. (1 pair)