In many cases, earmolds sit inside the ear canal, hidden from view. Other times, earmolds sit in the concha bowl as well as in the ear canal. Because earmolds worn in the concha so closely match the ear's natural contours and skin tone, they're hard to spot.
Soft, dome-style earmolds are often paired with BTE hearing aids, and are worn in the ear canal. A BTE hearing aid is worn behind the ear, and transmits sound to the earmold via a thin, flexible tube.