ITC-style hearing aids are custom-made, based on an impression taken of your ear canal and the surrounding area. They are slightly larger than completely-in-canal (CIC) hearing aids, but still considered cosmetically appealing. All of the components in an ITC hearing aid are encased within a lightweight plastic shell. Their medium size makes them a great choice for push button controls. ITC hearing aids offer a secure fit, easy insertion and removal, and longer battery life. They work best for mild-to-moderate hearing loss.