Feature: 1. Good Waterproof Performance: Hearing aid guard is both waterproof and oil resistant, which can effectively prevent foreign objects such as earwax and dust from clogging the speakers. 2. Prevent Objects Enter: The wax filters can prevent foreign objects from entering the hearing aid and affecting the normal operation of the hearing aid. 3. Prolonged Service Life: Hearing aids can prevent earwax from accumulating in the earpieces, extending the service life of the hearing aids. 4. Superior Durability: The hearing aid filter is made of high quality materials to ensure long term durability with guaranteed quality.