No fitting or sizing required for these pre-molded flanged earplugs. 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.
Ear protection is incredibly important to guard against Surfer's Ear. Long exposure to cold water and wind can cause the ear to develop new bony lumps which can constrict the ear canal. Infection can also result.