Completely-in-the-canal (CIC) is part of the "family" of the ITE hearing Aids. They fit inside your auditory canal where the hearing aid cannot be seen easily. This is the smallest available model on the market. The positive side is that they are very discreet; impressions of the ear canal are taken in order to craft the aids. However, it is very difficult to handle. The hearing aid is so deep that it comes with a plastic thread to pull it out which can be seen if one looks closely. They cannot be used on patients with severe hearing loss and the shorter life of the tiny battery is a disadvantage. Its location deep in the ear canal exposes the hearing aid to the severe human environment, limiting the lifespan of CIC to about 4 years. But to those who do not wish others to know they have a hearing loss, the appeal of this type of hearing aid is obvious.