No fitting or sizing needed for these pre-molded flanged earplugs. Mack's Ear Seals (aka Ear Plugs) 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.

• Doctor recommended to seal out water, Mack's Ear Seals help prevent swimmer's ear and surfer's ear.
• These Ear Seals come with a convenient detachable cord for attaching to your helmet or PFD.
• Great for kayaking, swimming, surfing, snorkeling, rafting, etc.
• Shatterproof carrying case included.