The Oticon miniFit Open Dome is a glossy rubber covering that protects Oticon hearing aid speakers from wax, residue, and debris while keeping them appropriately positioned inside your ear throughout the day. Oticon miniFit Domes are suitable for small, medium, or large size ear canals. Made from durable medical-grade silicone, Oticon miniFit Domes will easily attach to most modern Oticon hearing aids. For maximum sound quality and to help prevent itchiness, staining, and tears, replace miniFit domes along with Oticon Prowax miniFit Filters and (optional) Oticon miniFit Ear Grips every month, or when your hearing aid has stopped working.