The Starkey Hearing Aid Comfort Buds Domes attach to the ear-end of hearing aids to keep them secure and comfortable during use and protects against dirt, debris, and ear-wax build-up. They are available in 2 different styles: Open Comfort and Occluded. Open Comfort buds feature vents to reduce contact with the ear canal wall with reduces itchiness and pressure points. Whereas, the Occluded buds provide more secure fitting with a retaining ring to help stop the the earbud from uncomfortably folding or puckering during use.